The Case Is Building That COVID-19 Had a Lab Origin

by Jonathan Latham

By Jonathan Latham, PhD and Allison Wilson, PhD

If the public has learned a lesson from the COVID-19 pandemic it is that science does not generate certainty. Do homemade face masks work? What is the death rate of COVID-19? How accurate are the tests? How many people have no symptoms? And so on. Practically the lone undisputed assertion made so far is that all the nearest known genetic relatives of its cause, the Sars-CoV-2 virus, are found in horseshoe bats (Zhou et al., 2020). Therefore, the likely viral reservoir was a bat.

However, most of these ancestor-like bat coronaviruses cannot infect humans (Ge et al., 2013). In consequence, from its beginning, a key question hanging over the pandemic has been: How did a bat RNA virus evolve into a human pathogen that is both virulent and deadly?

The answer almost universally seized upon is that there was an intermediate species. Some animal, perhaps a snake, perhaps a palm civet, perhaps a pangolin, served as a temporary host. This bridging animal would probably have had an ACE2 cellular receptor (the molecule which allows cellular entry of the virus) intermediate in protein sequence (or at least structure) between the bat and the human one (Wan et al., 2020).

Shi Zheng-Li releases a bat
Shi Zheng-Li releases a bat

In the press and in the scientific literature, scenarios by which this natural zoonotic transfer might have occurred have been endlessly mulled. Most were fuelled by early findings that many of the earliest COVID-19 cases seem to have occurred in and around Wuhan’s Huanan live animal market. [The latest data are that 14 of the 41 earliest cases, including the first, had no connection to the animal market (Huang et al. 2020)].

Since the two previous coronavirus near-pandemics of SARS (2002-3) and MERS (2012) both probably came from bats and both are thought (but not proven) to have transitioned to humans via intermediate animals (civets and dromedaries respectively), a natural zoonotic pathway is a reasonable first assumption (Andersen et al., 2020).

The idea, as it applied to the original (2002) SARS outbreak, is that the original bat virus infected a civet. The virus then evolved briefly in this animal species, but not enough to cause a civet pandemic, and then was picked up by a human before it died out in civets. In this first human (patient zero) the virus survived, perhaps only barely, but was passed on, marking the first case of human to human transmission. As it was successively passed on in its first few human hosts the virus rapidly evolved, adapting to better infect its new hosts. After a few such tentative transmissions the pandemic proper began.

Perhaps this scenario is approximately how the current COVID-19 pandemic began.

But one other troubling possibility must be dispensed with. It follows from the fact that the epicentre city, Wuhan (pop. 11 million), happens to be the global epicentre of bat coronavirus research (e.g. Hu et al., 2017).

Prompted by this proximity, various researchers and news media, prominently the Washington Post, and with much more data Newsweek, have drawn up a prima facie case that a laboratory origin is a strong possibility (Zhan et al., 2020; Piplani et al., 2020). That is, one of the two labs in Wuhan that has worked on coronaviruses accidentally let a natural virus escape; or, the lab was genetically engineering (or otherwise manipulating) a Sars-CoV-2-like virus which then escaped.

Unfortunately, in the US at least, the question of the pandemic’s origin has become a political football; either an opportunity for Sinophobia or a partisan “blame game“.

But the potential of a catastrophic lab release is not a game and systemic problems of competence and opacity are certainly not limited to China (Lipsitch, 2018). The US Department of Homeland Security (DHS) is currently constructing a new and expanded national Bio and Agro-defense facility in Manhattan, Kansas. DHS has estimated that the 50-year risk (defined as having an economic impact of $9-50 billion) of a release from its lab at 70%.

When a National Research Council committee inspected these DHS estimates they concluded “The committee finds that the risks and costs could well be significantly higher than that“.

A subsequent committee report (NAP, 2012) continued:

the committee was instructed to judge the adequacy and validity of the uSSRA [updated Site-Specific Risk Assessment]. The committee has identified serious concerns about (1) the misapplication of methods used to assess risk, (2) the failure to make clear whether and how the evidence used to support risk assessment assumptions had been thoroughly reviewed and adequately evaluated, (3) the limited breadth of literature cited and the misinterpretation of some of the significant supporting literature, (4) the failure to explain the criteria used to select assumptions when supporting literature is conflicting, (5) the failure to consider important risk pathways, and (6) the inadequate treatment of uncertainty. Those deficiencies are not equally problematic, but they occur with sufficient frequency to raise doubts about the adequacy and validity of the risk results presented. In most instances (e.g., operational activities at the NBAF), the identified problems lead to an underestimation of risk; in other instances (e.g., catastrophic natural hazards), the risks may be overestimated. As a result, the committee concludes that the uSSRA is technically inadequate in critical respects and is an insufficient basis on which to judge the risks associated with the proposed NBAF in Manhattan, Kansas.

China, meanwhile, having opened its first in Wuhan in 2018, is planning to roll out a national network of BSL-4 labs (Yuan, 2019). Like many other countries, it is investing significantly in disease surveillance and collection of viruses from wild animal populations and in high-risk recombinant virus research with Potential Pandemic Pathogens (PPPs).

On May 4th, nations and global philanthropies, meeting in Brussels, committed $7.4 billion to future pandemic preparedness. But the question hanging over all such investments is this: the remit of the Wuhan lab at the centre of the accidental release claims is pandemic preparedness. If the COVID-19 pandemic began there then we need to radically rethink current ideas for pandemic preparation globally. Many researchers already believe we should, for the sake of both safety and effectiveness (Lipsitch and Galvani, 2014; Weiss et al., 2015; Lipsitch, 2018). The worst possible outcome would be for those donated billions to accelerate the arrival of the next pandemic.

Historical lab releases, a brief history

An accidental lab release is not merely a theoretical possibility. In 1977 a laboratory in Russia (or possibly China), most likely while developing a flu vaccine, accidentally released the extinct H1N1 influenza virus (Nakajima et al., 1978). H1N1 went on to become a global pandemic virus. A large proportion of the global population became infected. In this case, deaths were few because the population aged over 20 yrs old had historic immunity to the virus. This episode is not widely known because only recently has this conclusion been formally acknowledged in the scientific literature and the virology community has been reluctant to discuss such incidents (Zimmer and Burke, 2009; Wertheim, 2010). Still, laboratory pathogen escapes leading to human and animal deaths (e.g. smallpox in Britain; equine encephalitis in South America) are common enough that they ought to be much better known (summarised in Furmanski, 2014). Only rarely have these broken out into actual pandemics on the scale of H1N1, which, incidentally, broke out again in 2009/2010 as “Swine flu” causing deaths estimated variously at 3,000 to 200,000 on that occasion (Duggal et al., 2016; Simonsen et al. 2013).

Many scientists have warned that experiments with PPPs, like the smallpox and Ebola and influenza viruses, are inherently dangerous and should be subject to strict limits and oversight (Lipsitch and Galvani, 2014; Klotz and Sylvester, 2014). Even in the limited case of SARS-like coronaviruses, since the quelling of the original SARS outbreak in 2003, there have been six documented SARS disease outbreaks originating from research laboratories, including four in China. These outbreaks caused 13 individual infections and one death (Furmanski, 2014). In response to such concerns the US banned certain classes of experiments, called gain of function (GOF) experiments, with PPPs in 2014, but the ban (actually a funding moratorium) was lifted in 2017.

For these reasons, and also to ensure the effectiveness of future pandemic preparedness efforts­, it is a matter of vital international importance to establish whether the laboratory escape hypothesis has credible evidence to support it. This must be done regardless of the problem–in the US–of toxic partisan politics and nationalism.

The COVID-19 Wuhan lab escape thesis

The essence of the lab escape theory is that Wuhan is the site of the Wuhan Institute of Virology (WIV), China’s first and only Biosafety Level 4 (BSL-4) facility. (BSL-4 is the highest pathogen security level). The WIV, which added a BSL-4 lab only in 2018, has been collecting large numbers of coronaviruses from bat samples ever since the original SARS outbreak of 2002-2003; including collecting more in 2016 (Hu, et al., 2017; Zhou et al., 2018).

Led by researcher Zheng-Li Shi, WIV scientists have also published experiments in which live bat coronaviruses were introduced into human cells (Hu et al., 2017). Moreover, according to an April 14 article in the Washington Post, US Embassy staff visited the WIV in 2018 and “had grave safety concerns” about biosecurity there. The WIV is just eight miles from the Huanan live animal market that was initially thought to be the site of origin of the COVID-19 pandemic.

Wuhan is also home to a lab called the Wuhan Centers for Disease Prevention and Control (WCDPC). It is a BSL-2 lab that is just 250 metres away from the Huanan market. Bat coronaviruses have in the past been kept at the Wuhan WCDPC lab.

Thus the lab escape theory is that researchers from one or both of these labs may have picked up a Sars-CoV-2-like bat coronavirus on one of their many collecting (aka ‘”virus surveillance”) trips. Or, alternatively, a virus they were studying, passaging, engineering, or otherwise manipulating, escaped.

Scientific assessments of the lab escape theory

On April 17 the Australian Science Media Centre asked four Australian virologists: “Did COVID-19 come from a lab in Wuhan?

Three (Edward Holmes, Nigel McMillan and Hassan Vally) dismissed the lab escape suggestion and Vally simply labeled it, without elaboration, a “conspiracy”.

The fourth virologist interviewed was Nikolai Petrovsky of Flinders University. Petrovsky first addressed the question of whether the natural zoonosis pathway was viable. He told the Media Centre:

no natural virus matching to COVID-19 has been found in nature despite an intensive search to find its origins.”

That is to say, the idea of an animal intermediate is speculation. Indeed, no credible viral or animal host intermediaries, either in the form of a confirmed animal host or a plausible virus intermediate, has to-date emerged to explain the natural zoonotic transfer of Sars-CoV-2 to humans (e.g. Zhan et al., 2020).

In addition to Petrovsky’s point, there are two further difficulties with the natural zoonotic transfer thesis (apart from the weak epidemiological association between early cases and the Huanan “wet” market).

The first is that researchers from the Wuhan lab travelled to caves in Yunnan (1,500 Km away) to find horseshoe bats containing SARS-like coronaviruses. To-date, the closest living relative of Sars-CoV-2 yet found comes from Yunnan (Ge et al., 2016). Why would an outbreak of a bat virus therefore occur in Wuhan?

Moreover, China has a population of 1.3 billion. If spillover from the wildlife trade was the explanation, then, other things being equal, the probability of a pandemic starting in Wuhan (pop. 11 million) is less than 1%.

Zheng-Li Shi, the head of bat coronavirus research at WIV, told Scientific American as much:

I had never expected this kind of thing to happen in Wuhan, in central China.” Her studies had shown that the southern, subtropical provinces of Guangdong, Guangxi and Yunnan have the greatest risk of coronaviruses jumping to humans from animals—particularly bats, a known reservoir. If coronaviruses were the culprit, she remembers thinking, “Could they have come from our lab?”

Wuhan, in short, is a rather unlikely epicentre for a natural zoonotic transfer. In contrast, to suspect that Sars-CoV-2 might have come from the WIV is both reasonable and obvious.

Was Sars-CoV-2 created in a lab?

In his statement, Petrovsky goes on to describe the kind of experiment that, in principle, if done in a lab, would obtain the same result as the hypothesised natural zoonotic transfer–rapid adaptation of a bat coronavirus to a human host.

Take a bat coronavirus that is not infectious to humans, and force its selection by culturing it with cells that express human ACE2 receptor, such cells having been created many years ago to culture SARS coronaviruses and you can force the bat virus to adapt to infect human cells via mutations in its spike protein, which would have the effect of increasing the strength of its binding to human ACE2, and inevitably reducing the strength of its binding to bat ACE2.

Viruses in prolonged culture will also develop other random mutations that do not affect its function. The result of these experiments is a virus that is highly virulent in humans but is sufficiently different that it no longer resembles the original bat virus. Because the mutations are acquired randomly by selection there is no signature of a human gene jockey, but this is clearly a virus still created by human intervention.

In other words, Petrovsky believes that current experimental methods could have led to an altered virus that escaped.

Passaging, GOF research, and lab escapes

The experiment mentioned by Petrovsky represents a class of experiments called passaging. Passaging is the placing of a live virus into an animal or cell culture to which it is not adapted and then, before the virus dies out, transferring it to another animal or cell of the same type. Passaging is often done iteratively. The theory is that the virus will rapidly evolve (since viruses have high mutation rates) and become adapted to the new animal or cell type. Passaging a virus, by allowing it to become adapted to its new situation, creates a new pathogen.

The most famous such experiment was conducted in the lab of Dutch researcher Ron Fouchier. Fouchier took an avian influenza virus (H5N1) that did not infect ferrets (or other mammals) and serially passaged it in ferrets. The intention of the experiment was specifically to evolve a PPP. After ten passages the researchers found that the virus had indeed evolved, to not only infect ferrets but to transmit to others in neighbouring cages (Herfst et al., 2012). They had created an airborne ferret virus, a Potential Pandemic Pathogen, and a storm in the international scientific community.

The second class of experiments that have frequently been the recipients of criticism are GOF experiments. In GOF research, a novel virus is deliberately created, either by in vitro mutation or by cutting and pasting together two (or more) viruses. The intention of such reconfigurations is to make viruses more infectious by adding new functions such as increased infectivity or pathogenicity. These novel viruses are then experimented on, either in cell cultures or in whole animals. These are the class of experiments banned in the US from 2014 to 2017.

Some researchers have even combined GOF and passaging experiments by using recombinant viruses in passaging experiments (e.g. Sheahan et al., 2008).

Such experiments all require recombinant DNA techniques and animal or cell culture experiments. But the very simplest hypothesis of how Sars-CoV-2 might have been caused by research is simply to suppose that a researcher from the WIV or the WCDCP became infected during a collecting expedition and passed their bat virus on to their colleagues or family. The natural virus then evolved, in these early cases, into Sars-CoV-2. For this reason, even collecting trips have their critics. Epidemiologist Richard Ebright called them “the definition of insanity“. Handling animals and samples exposes collectors to multiple pathogens and returning to their labs then brings those pathogens back to densely crowded locations.

Was the WIV doing experiments that might release PPPs?

Since 2004, shortly after the original SARS outbreak, researchers from the WIV have been collecting bat coronaviruses in an intensive search for SARS-like pathogens (Li et al., 2005). Since the original collecting trip, many more have been conducted (Ge et al., 2013; Ge et al., 2016; Hu et al., 2017; Zhou et al., 2018).

Petrovsky does not mention it but Zheng-Li Shi’s group at the WIV has already performed experiments very similar to those he describes, using those collected viruses. In 2013 the Shi lab reported isolating an infectious clone of a bat coronavirus that they called WIV-1 (Ge et al., 2013). WIV-1 was obtained by introducing a bat coronavirus into monkey cells, passaging it, and then testing its infectivity in human (HeLa) cell lines engineered to express the human ACE2 receptor (Ge et al., 2013).

In 2014, just before the US GOF research ban went into effect, Zheng-Li Shi of WIV co-authored a paper with the lab of Ralph Baric in North Carolina that performed GOF research on bat coronaviruses (Menachery et al., 2015).

In this particular set of experiments the researchers combined “the spike of bat coronavirus SHC014 in a mouse-adapted SARS-CoV backbone” into a single engineered live virus. The spike was supplied by the Shi lab. They put this bat/human/mouse virus into cultured human airway cells and also into live mice. The researchers observed “notable pathogenesis” in the infected mice (Menachery et al. 2015). The mouse-adapted part of this virus comes from a 2007 experiment in which the Baric lab created a virus called rMA15 through passaging (Roberts et al., 2007). This rMA15 was “highly virulent and lethal” to the mice. According to this paper, mice succumbed to “overwhelming viral infection”.

In 2017, again with the intent of identifying bat viruses with ACE2 binding capabilities, the Shi lab at WIV reported successfully infecting human (HeLa) cell lines engineered to express the human ACE2 receptor with four different bat coronaviruses. Two of these were lab-made recombinant (chimaeric) bat viruses. Both the wild and the recombinant viruses were briefly passaged in monkey cells (Hu et al., 2017).

Together, what these papers show is that: 1) The Shi lab collected numerous bat samples with an emphasis on collecting SARS-like coronavirus strains, 2) they cultured live viruses and conducted passaging experiments on them, 3) members of Zheng-Li Shi’s laboratory participated in GOF experiments carried out in North Carolina on bat coronaviruses, 4) the Shi laboratory produced recombinant bat coronaviruses and placed these in human cells and monkey cells. All these experiments were conducted in cells containing human or monkey ACE2 receptors.

The overarching purpose of such work was to see whether an enhanced pathogen could emerge from the wild by creating one in the lab. (For a very informative technical summary of WIV research into bat coronaviruses and that of their collaborators we recommend this post, written by biotech entrepreneur Yuri Deigin).

It also seems that the Shi lab at WIV intended to do more of such research. In 2013 and again in 2017 Zheng-Li Shi (with the assistance of a non-profit called the EcoHealth Alliance) obtained a grant from the US National Institutes of Health (NIH). The most recent such grant proposed that:

host range (i.e. emergence potential) will be tested experimentally using reverse genetics, pseudovirus and receptor binding assays, and virus infection experiments across a range of cell cultures from different species and humanized mice” (NIH project #5R01Al110964-04).

It is hard to overemphasize that the central logic of this grant was to test the pandemic potential of SARS-related bat coronaviruses by making ones with pandemic potential, either through genetic engineering or passaging, or both.

Apart from descriptions in their publications we do not yet know exactly which viruses the WIV was experimenting with but it is certainly intriguing that numerous publications since Sars-CoV-2 first appeared have puzzled over the fact that the SARS-CoV-2 spike protein binds with exceptionally high affinity to the human ACE2 receptor “at least ten times more tightly” than the original SARS (Zhou et al., 2020; Wrapp et al., 2020; Wan et al., 2020; Walls et al., 2020; Letko et al., 2020).

This affinity is all the more remarkable because of the relative lack of fit in modelling studies of the SARS-CoV-2 spike to other species, including the postulated intermediates like snakes, civets and pangolins (Piplani et al., 2020). In this preprint these modellers concluded “This indicates that SARS-CoV-2 is a highly adapted human pathogen”.

Given the research and collection history of the Shi lab at WIV it is therefore entirely plausible that a bat SARS-like cornavirus ancestor of Sars-CoV-2 was trained up on the human ACE2 receptor by passaging it in cells expressing that receptor.

[On June 4 an excellent article in the Bulletin of the Atomic Scientists went further. Pointing out what we had overlooked, that the Shi lab also amplified spike proteins of collected coronaviruses, which would make them available for GOF experimentation (Ge et al., 2016).]

How do viruses escape from high security laboratories?

Pathogen lab escapes take various forms. According to the US Government Accountability Office, a US defense Department laboratory once “inadvertently sent live Bacillus anthracis, the bacterium that causes anthrax, to almost 200 laboratories worldwide over the course of 12 years. The laboratory believed that the samples had been inactivated.” In 2007, Britain experienced a foot and mouth disease outbreak. Its’ origin was a malfunctioning waste disposal system of a BSL-4 laboratory leaking into a stream from which neighbouring cows drank. The disposal system had not been properly maintained (Furmanski, 2014). In 2004 an outbreak of SARS originating from the National Institute of Virology (NIV) in Beijing, China, began, again, with the inadequate inactivation of a viral sample that was then distributed to non-secure parts of the building (Weiss et al., 2015).

Writing for the Bulletin of The Atomic Scientists in February 2019, Lynn Klotz concluded that human error was behind most laboratory incidents causing exposures to pathogens in US high security laboratories. While equipment failure was also a factor, of the 749 incidents reported to the US Federal Select Agent Programme between 2009-2015, Klotz concluded that 79% resulted from human error.

But arguably the biggest worry is incidents that go entirely unreported because escape of the pathogen goes undetected. It is truly alarming that a significant number of pathogen escape events were uncovered only because investigators were in the process of examining a completely different incident (Furmanski, 2014). Such discoveries represent strong evidence that pathogen escapes are under-reported and that important lessons still need to be learned (Weiss et al., 2015).

The safety record of the WIV

The final important data point is the biosafety history of the WIV. The WIV was built in 2015 and became a commissioned BSL-4 lab in 2018. According to Josh Rogin of the Washington Post, US embassy officials visited the WIV in 2018. They subsequently warned their superiors in Washington of a “serious shortage of appropriately trained technicians and investigators needed to safely operate this high-containment laboratory”.

And according to VOA News, a year before the outbreak, “a security review conducted by a Chinese national team found the lab did not meet national standards in five categories.”

Credible reports from within China also question lab biosafety and its management. In 2019, Yuan Zhiming, biosecurity specialist at the WIV, cited the “challenges” of biosafety in China. According to Yuan: “several high-level BSLs have insufficient operational funds for routine yet vital processes” and “Currently, most laboratories lack specialized biosafety managers and engineers.” He recommends that “We should promptly revise the existing regulations, guidelines, norms, and standards of biosafety and biosecurity”. Nevertheless, he also notes that China intends to build “5-7” more BSL-4 laboratories (Yuan, 2019).

And in February 2020, Scientific American interviewed Zheng-Li Shi. Accompanying the interview was a photograph of her releasing a captured bat. In the photo she is wearing a casual pink unzipped top layer, thin gloves, and no face mask or other protection. Yet this is the same researcher whose talks give “chilling” warnings about the dire risks of human contact with bats.

All of which tends to confirm the original State Department assessment. As one anonymous “senior administration official” told Rogin:

“The idea that it was just a totally natural occurrence is circumstantial. The evidence it leaked from a lab is circumstantial. Right now, the ledger on the side of it leaking from the lab is packed with bullet points and there’s almost nothing on the other side.”

The leading hypothesis is a lab outbreak

For all these reasons, a lab escape is by far the leading hypothesis to explain the origins of Sars-CoV-2 and the COVID-19 pandemic. The sheer proximity of the WIV and WCDCP labs to the outbreak and the nature of their work represents evidence that can hardly be ignored. The long international history of lab escapes and the biosafety concerns from all directions about the labs in Wuhan greatly strengthen the case. Especially since evidence for the alternative hypothesis, in the form of a link to wild animal exposure or the wildlife trade, remains extremely weak, being based primarily on analogy with SARS one (Bell et al,. 2004; Andersen et al., 2020).

Nevertheless, on April 16th Peter Daszak, who is the President of the EcoHealth Alliance, told Democracy Now! in a lengthy interview that the lab escape thesis was “Pure baloney”. He told listeners:

“There was no viral isolate in the lab. There was no cultured virus that’s anything related to SARS coronavirus 2. So it’s just not possible.”

Daszak made very similar claims on CBS’s Sixty Minutes: “There is zero evidence that this virus came out of a lab in China.” Instead, Daszak encouraged viewers to blame “hunting and eating wildlife”.

Daszak’s certainty is highly problematic on several counts. The closest related known coronaviruses to Sars-CoV-2 are to be found at the WIV so a lot depends on what he means by “related to”. But it is also dishonest in the sense that Daszak must know that culturing in the lab is not the only way that WIV researchers could have caused an outbreak. Third, and this is not Daszak’s fault, the media are asking the right question to the wrong person.

As alluded to above, Daszak is the named principal investigator on multiple US grants that went to the Shi lab at WIV. He is also a co-author on numerous papers with Zheng-Li Shi, including the 2013 Nature paper announcing the isolation of coronavirus WIV-1 through passaging (Ge et al., 2013). One of his co-authorships is on the collecting paper in which his WIV colleagues placed the four fully functional bat coronaviruses into human cells containing the ACE2 receptor (Hu et al. 2017). That is, Daszak and Shi together are collaborators and co-responsible for most of the published high-risk collecting and experimentation at the WIV.

An investigation is needed, but who will do it?

If the Shi lab has anything to hide, it is not only the Chinese Government that will be reluctant to see an impartial investigation proceed. Much of the work was funded by the US taxpayer, channeled there by Peter Daszak and the EcoHealth Alliance. Virtually every credible international organisation that might in principle carry out such an investigation, the WHO, the US CDC, the FAO, the US NIH, including the Gates Foundation, is either an advisor to, or a partner of, the EcoHealth Alliance. If the Sars-CoV-2 outbreak originated from the bat coronavirus work at the WIV then just about every major institution in the global public health community is implicated.

But to solve many of these questions does not necessarily require an expensive investigation. It would probably be enough to inspect the lab notebooks of WIV researchers. All research scientists keep detailed notes, for intellectual property and other reasons, but especially in BSL-4 labs. As Yuan Zhiming told Nature magazine in an article marking the opening of the facility in Wuhan: “We tell them [staff] the most important thing is that they report what they have or haven’t done.”

Meticulous lab records plus staff health records and incident reports of accidents and near-accidents are all essential components (or should be) of BSL work. Their main purpose is to enable the tracking of actual incidents. Much speculation could be ended with the public release of that information. But the WIV has not provided it.

This is puzzling since the Chinese government has a very strong incentive to produce those records. Complete transparency would potentially dispel the gales of blame coming its way; especially on the question of whether Sars-CoV-2 has an engineered or passaged origin. If Zheng-Li Shi and Peter Daszak are correct that nothing similar to Sars-CoV-2 was being studied there, then those notebooks should definitively exonerate the lab from having knowingly made an Actual Pandemic Pathogen.

Given the simplicity and utility of this step this lack of transparency suggests that there is something to hide. If so, it must be important. But then the question is: What?

A thorough investigation of the WIV and its bat coronavirus research is an important first step. But the true questions are not the specific mishaps and dissemblings of Drs Shi or Daszak, nor of the WIV, nor even of the Chinese government.

Rather, the bigger question concerns the current philosophy of pandemic prediction and prevention. Deep enquiries should be made about the overarching wisdom of plucking and counting viruses from the wild and then performing dangerous ‘what if’ recombinant research in high tech but fallible biosafety labs. This is a reductionistic approach, we also note, that has so far failed to predict or protect us from pandemics and may never do so.


Footnote: This article was updated on June 3rd to broaden the estimates of “Swine Flu” deaths, from 3,000 to 3- to 200,000.

Note: On July 15th we published a follow-up to this article: “A Proposed Origin for SARS-CoV-2 and the COVID-19 Pandemic” which carries the analysis above much further and proposes exactly how Sars-CoV-2 might have escaped from the WIV.


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Comments 82
  • The best article I have ever read on this topic in the last five months

  • It is extremely important that researchers do not feel conspirators if they consider possible an artificial origin for SARS-CoV-2. It is absolutely possible and this article explain it very thoroughly. An investigation is needed and it should consider all the labs involved in such projects. Thank you for writing it.

  • Absolutely thorough and interesting, obviously written by someone expecting to get stung by mosquitoes of a certain kind. Great job.

  • Very interesting and enlightening article on a controversial topic. Thank you.

  • Very interesting and compelling work.
    For further precise information follow article and comments here:
    “Scientific evidence and logic behind the claim that the Wuhan coronavirus is man-made”

    But one thing: Is it not naiv to think about availabilility and reliability of researchers booknotes?
    When somebody states that “samples have been destroyed” What doe it mean?

    • Javier,

      nerdhaspower has a related blog post – where their Figure 3 (from early May) looks the same as Figure 4 from this Science Magazine article – (published end of May)

      Where did nerdhaspower get the figure? Why is it in Science Magazine now?

      • These figures are similar because both are comparing the same: the w=non-synosynonymous/synonymous ratio in the particular S2 region of the Spike proteine. The ratio 0.013 in the CoV19-RaTG13 is considered in someone’s opinion very “unlikely natural” but others say that is “quite natural” since this S2 region is a “well established” region not subject to aminoacid changes (what is called “under strong (negative) or purifying selection pressure”).
        Anyway, from database genomes and bioinformatic software tools someone can get these pictures.
        Here, in these two videos ” Coronavirus: Are Our Scientists Lying To Us?”,
        and “More Evidence Covid-19 May *NOT* Be Natural”, published by Chris Martenson’s-Peak Prosperity are shown easy to understand explanations about these issues.

        • The labels “Group A” and “Group B” match too. I suspect that nerdhaspower is actually a member of the team that wrote the Science Magazine paper, but they are afraid to speak publicly.

  • Even from point of view of failure analysis, investigation into WIV lab is warranted. Outbreak of pandemic is failure of public health management, and analysis of the failure ALWAYS starts with where the failure first occurs. Uncovering root causes (origin) of failure is the purpose of failure analysis. If failure analysis leads to somewhere else as failure’s origin, so be it. But failure analysis starts where the failure first occurs. SARS-CoV-2 could come from a lab:

  • No mention of the US labs, American tax dollars, and many other international interests involved.

    • Mention of US funds used Is made in the article. “…investigation is needed, but who will do it?
      If the Shi lab has anything to hide, it is not only the Chinese Government that will be reluctant to see an impartial investigation proceed. Much of the work was funded by the US taxpayer, channeled there by Peter Daszak and the EcoHealth Alliance. Virtually every credible international organisation that might in principle carry out such an investigation, the WHO, the US CDC, the FAO, the US NIH, including the Gates Foundation, is either an advisor to, or a partner of, the EcoHealth Alliance. If the Sars-CoV-2 outbreak originated from the bat coronavirus work at the WIV then just about every major institution in the global public health community is implicated.”

  • Finally some people with a brain are looking into this. Don’t listen to the scientist (virologists) that have conflicts of interest with their pocket books. Those that are yelling the loudest, “This virus came from nature”, have the most to lose from it actually coming from a lab. So obvious and laughable.

    Very nice common sense analysis, thank you! Let the science win!

  • From my time working in a laboratory, notebooks were extremely important. That’s a great point to raise, hopefully a detailed investigation will follow from this.

  • Excellent article! I just published a book on this called “The Wuhan Lab and the Mad Science Dr Fauci Funded.” It got banned on Amazon. It’s forbidden. It’s on LuLu though.

    Also, the Zhengli/Baric GOF experiment in 2014 was not right before the ban. It was right after. But Fauci gave them an exemption because their grant was already funded. I have the email they received. WIV continued to be funded for GOF during the ban.

    • Excellent comment. The FBI should put Baric and UNC in the hot seat and question both intensively regarding the level of access that Wuhan personnel were granted to the bat-covid samples. Additionally, UNC should disclose how much, if any, grant funding was accepted by UNC, or its foundations, from China prior to Shi Zhengli being accepted by Baric as a research partner. Federal laws against espionage may have been broken.

  • 2009-2010 Swine Flu killed 3k?
    These authors work for the Obama admin.?

  • In JAN, Francis Boyle was interviewed on Geopolitics & Empire (yt). He spilt the beans then (all BSL-4s leak, WIV funded partially by US, collusion between Chinese professors and US universities, and on and on). YT pulled the interview, though there are follow-ups. DYOR on that.

    Couple months ago, Chris Martenson asked, “… if this virus was organic, how do you explain the presence of the polybasic furin cleavage site, PRRA?” That is, it would’ve taken nature many years to evolve into this kind of molecular structure. Check his yt streams for more.

    Boyle and Martenson have kept this college drop-out up-to-date. Sadly, I can’t recall a more sinister cover-up loaded with an international cast of Oscar-stealing villians. And that’s over 60-years of memories.

    Anyway, keep up the good work.

  • At last. A well-researched sturdily independent assessment that confirms what other independent-minded experts have suggested from the start, only to be shouted down by the Gates foundation-funded experts and the incestuous web of public health bodies that influence not just policy but lab research.

    Gain-of-function research changes animal viruses to make them harmful to human beings using the pretext that doing so helps defend against such mutations should they arise naturally. But they rarely if ever do. But what does happen quite commonly are lab accidents. Bottom line – the research is unethical, horribly dangerous, and a massive waste of research dollars.

    Thank you for doing the job that mainstream journalists no longer do.

  • The evidence I want to see is the serology of Ms. Shi and her colleagues. If they passed the virus, they must have the IgG.

  • Excellent article!
    The most compelling information for me was the finding that the COVID-19 virus binds 10-fold better to human ACE2 receptor than to the original SARS virus, and that it shows no such affinity in other species (from modelling studies).

  • Thank you for the lovely article. I truly enjoyed it. I’m not a virologist, although I do come from a different scientific background, and this article really breaks down the statistical probability that there is for human error leading to a virus “leak”, and how viruses can change or be changed to start infecting different hosts. I’m confused on a few things (and this may be due to my lack of political understanding of lack of virology understanding):

    1) why would some of the “major” (more well known) virologist suggest that this is not lab made?

    2) even though the notes from WIV scientists have not been examined, Dr. Zhengli claims to of have compared the COVID-19 strain with other viral strains studied in her lab, which do not remotely match ( Does this mean that there is a possibility of scientists at WIV are lying and hence why their notes require examination? I wouldn’t understand why the lie (if this IS implied).

    I guess my question would be, why the divide? Perhaps someone who is elbow deep in the field could break it down in layman’s terms?

    • The short answer to Q1. Brenda is that the field as a whole has multiple conflicts of interest: Patents, businesses, consultancies, NGOs, with the actual or potential profitmakers; not to mention their own careers at stake. It takes a brave virologist to speak out about this. Read “The River: a journey to the source of AIDS”. Here is a start:
      This should also answer Q2. Scientists are no more immune to conflicts of interest than any other sector of society. If Sars-CoV-2 were definitively found to come from a lab (engineered or not) questions would be asked about the validity of the prevailing business model for pandemic detection/prevention etc.

  • A very well written article. My main problem with it is one of balance. The arguments for lab origin are strong but there is too little on the arguments for natural origin. The discussion of some of the logic for natural causes gives the impression that this is the sum of the evidence, which is potentially misleading. It is also interesting that the article denounces those who call the lab origin concept conspiratorial but suggest conspiracy amongst those who defend the lab’s position. I think this is a very important article as long as it is read as a through and logical analysis mainly of only one side of the debate.

  • Excellent article! There is another small but interesting piece of the puzzle by Shi Zhengli and here collaborators at the WIV – seropositive studies around the Yunnan Caves and Southern China. They were looking for evidence of zoonotic transfers in the local “high risk” populous.. What they found was evidence of low rates (2.7%)of seropositive for Bat Like SARS-CoV (BL-SARS-CoV) in Yunnan, and non in southern China.

    But here is the kicker, they actually used a sample from Wuhan as a negative control (albiet small sample size n=240, 1 positive) for BL-SARS-CoV in 2015 in the at risk populations. To spell it out, the Shi Zhengli group demonstrated conclusively that there is no endemic BL-SARS-CoV in Wuhan as of 2015.

    It is true, that something could have changed since 2015., bats and BL-SARS-CoV could have appeared spontaneously in Wuhan However, this is a strong piece of evidence that appears not to be the case.

    Geographical structure of bat SARS-related coronaviruses

    Human-animal interactions and bat coronavirus spillover potential among rural residents in Southern China

    MERS also provides an excellent zoonotic transfer template. It has had many failed spillover events, it is not adapted to Human-to-Human transmission, In contrast, SARS-CoV-2 appears to be far too well adapted to have resulted from a wild spillover event. If it had, it would have been been causing a mystery pneumonia for years prior to 2019, and we would have found evidence of it.

    Full MERS review: What Have We Learned About Middle East Respiratory Syndrome Coronavirus Emergence in Humans? A Systematic Literature Review

    Note the low R0, it is constantly infecting and burning itself out with an R0<1.

    Another excellent resource is Wildlife and Emerging Zoonotic Diseases: The Biology, Circumstances and Consequences of Cross-Species Transmission (Current Topics in Microbiology and … Topics in Microbiology and Immunology) by James E. Childs

  • The authors said, “Given the simplicity and utility of this step this lack of transparency suggests that there is something to hide. If so, it must be important. But then the question is: What?” But Zheng_Li Shi has already did a preliminary examination of her lab’s records. She was relieved to find that none of the viruses studied can be directly related to the Sars-COV-2 virus. She also studied records of her co-workers. China has also said that they will allow an investigation, but strictly scientific, and after the pandemic passes. If most people do not understand the intricate details of virology, then why would the authors assume that the Chinese government is hiding something which even they don’t understand? Can the authors address my points???

    • I (JRL) am a virologist. I understand pretty well the “intricate details of virology”.First, China should not set conditions on any investigation and has been contradictory in its official statements. Second it has to be independent and it can hardly rely on the say-so of Dr Shi, who would be the main subject of that investigation! Third, what does that mean strictly scientific? Fourth, it should happen quickly. The investigation issue is discussed in more detail here well here:

      • From saying that they refused an investigation and therefore have something to hide, to this: “China should not set conditions on any investigation”, and “can hardly rely on the say-so of Dr Shi”, “what does it mean, strictly scientific”, and “it should happen quickly”, show a large backtracking on your part. Why not just be UNBIASED from the beginning?

  • Shi Zheng-Li has already done a preliminary review of her records and the lab’s records. Of course an investigation by international experts would be a good addition. China said that they would agree to such an investigation, strictly scientific, but after the pandemic.

  • Former MI6’s chief Sir Richard Dearlove claims that coronavirus was man-made in Chinese lab. Downing St. calls it ‘fanciful’.

    Podcast – – interview starts around 10:30

  • Great article!

  • Didn’t Dr Gao Fu, director of China’s Center for Disease Control and Prevention say a couple of days ago that the Wuhan market was not the origin of the coronavirus, but the victim of a super spreading event? This would mean that a lab origin Is even more proabable, isn‘t it?

  • Possibly an escape from a lab? Why not a genetically targeted bioweapon?
    Think about it. China has suffered so much less than the rest of the world. How could that be?
    Maybe they’re government responses were so much better than everyone else’s? Ridiculous on the face of it.
    Maybe they’ve hidden the true extent of their suffering? Hidden a million or more deaths? Impossible….
    ….which means the Han possess much greater immunity than everyone else.
    How could that be achieved? Well we know blood type and ACE receptors have different statistical profiles among different racial groups. Probably a lot of other significant diffences are genetic as well. What if the Chinese in their passaging experiments trained covid 19 using different blood types and cells from different racial groups and noticed that the trained viruses were much more damaging to certain groups than to others?

    If there’s are truth to this the Chinese would have hidden all records of such experiments. It’s surprising how much can be hidden with enough wealth and power.
    It’s also true that our lefties would not tolerate any explanation which does not lay principle blame on Trump and his white supporters.
    None of that really matters because people in labs everywhere will be trying to achieve the same results. If they do the cat is out of the bag.

  • What the world needs now is a
    Biological Weapons Watchdog Group
    My Opinion with reference material:

    The Sunshine Project was the only real watchdog
    group for biological weapons and biotechnology.

    They suspended operations in Feb 2008 due to
    “a lack of funding and donations”

    #BioWeapons Archived At The Wayback Machine


    Dead Scientists 2004-2011
    Includes SOME of The Mysterious Deaths Of Numerous Microbiologists {aka Biological Weapons Scientists}


    Please consider the lyrics to the song
    “Word Of Mouth” by Mike & The Mechanics
    “Do you believe everything they’ve told you”

    With “THAT SAID” this ARCHIVED Wikipedia page does have a number of “External Links” that are worth taking a look at.

    ARCHIVED Wikipedia – Sunshine Project


    This is starting to look very, very ugly. The Chinese Communists have a lot to answer for.

  • I’m just a layman who got interested around May 1 when the “Five Eyes Dossier” story broke. Your article is one of the best I’ve seen. Also the Bulletin of Atomic Scientists one. I spent many hours reading and writing an essay but it doesn’t say anything not said better here or in the other articles. The world needs an exhaustive investigation into the government-academic tie-ins to this fiasco.

  • Excellent article.

    It is worth adding that on the 20 April 2020, Yuan Zhiming, the Wuhan Institute of Virology’s Communist Party chief, hit back at those promoting theories that the virus had escaped from the facility and caused the outbreak in the central Chinese city. “There is absolutely no way that the virus originated from our institute,” Yuan said in an interview with the state-run China Global Television Network.

    The key word here is ‘our’…

    In September 2019 Yuan Zhiming published a detailed paper in the Journal of Biosafety and Biosecurity that listed many operational and financial issues with Chinese labs.
    Here are a few chosen quotes:

    “[…] due to different investment sources, affiliations, and management systems, the implementation of these laboratories faces difficulties converging objectives and cooperation workflows. This scenario puts laboratory biosafety at risk since the implementation efficiency and timely operations are relatively compromised.”

    “[…] several high-level BSLs have insufficient operational funds for routine yet vital processes. Due to the limited resources, some BSL-3 laboratories run on extremely minimal operational costs or in some cases none at all.”

    “Currently, most laboratories lack specialized biosafety managers and engineers. In such facilities, some of the skilled staff is composed by part-time researchers. This makes it difficult to identify and mitigate potential safety hazards in facility and equipment operation early enough”

    No going back to basics:
    What we know for sure is that (1) the outbreak started in Wuhan, (2) the market does not seem to be the source, (3) there is no horseshoe bats colony in Hubei and (4) there were no bats sold at the market.

    This leaves us with a few possibilities:
    a. Some bat to human transmission happened in Wuhan
    b. Some animal (not bat) to human transmission happened in Wuhan.
    c. Some bat to human transmission happened in South China (where the bat colonies are)
    d. Some animal (not bat) to human transmission happened somewhere else than Wuhan

    Let’s look at these:
    a. Since there are no population of bats in Wuhan and none were sold at the market, what were the bats doing there? How did they get there?

    Clearly they must have been transported. If it was for food then the chance of these bats to go infectious in Wuhan and only Wuhan is rather small – they are many other cities were you would expect bats to be sold. The 1% of the article is a good estimate.
    Hence most likely not transported for food. So most likely transported for lab work. And since Wuhan is the Chinese were the lab work is concentrated, it would make sense.

    b. Same argument as above. If the animals are transported for food, then why Wuhan of all Chinese cities? The probability of such an event is small. So most likely not-for-food. Which means lab animals. Likely animals collected close to South China bat caves.

    c. If the bat-to-human transmission happened in South China, then why did the outbreak happened in Wuhan only of all Chinese cities?
    The probability of such an event is very small. The only thing that would select Wuhan as likely end destination is again lab work. So that would be someone collecting bats getting infected at the collection point.

    d. Same argument as above. Why would again the infected human then pop up exclusively in Wuhan of all Chinese cities?
    Most likely scenario: because the animals, rodent, whatever were part of a study in pathogenes – where Wuhan was again having a leading role.

    Whatever way you look at it, the fact that it happened in Wuhan and only in Wuhan – where there is no bat population – points back to a collection, transport or lab accident.

  • A tremendously well-researched article. It was published on 3 Jun but I have noticed that a number of articles from Chinese researchers from March to May 2019 are already speaking about three bat coronaviruses that exhibit naturally-occurring, but not the same, inserts on the s1/s2 spikes that are the reason that Covid-19 binds so well on the ACE2 receptors on the human namely: RmYN01, RmYN02 and the unknown and unproven RaTG13 (no existing specimens to check). They claim that these correspond between 93% – 96% to the makeup of Covid-19 but much less on their ability to infect humans. Is there anything you can add to this or is this a defensive mechanism from Chinese researchers to justify the areas on which they feel vulnerable prior to more extensive research.

  • ummm very interesting, one question is tho if this was / came from a lab the reasons behind it would be to crash the economy right ? So you crash it and then ”someone” takes control of this ? or is it just a money thing

  • Mr. Latham and Ms. Wilson wrote: ” The bigger question then is: what?” are they hiding.

    Based on your other research, do you care to speculate?

    Excellent article. Thank you!

  • Here’s one theory:

    Cunningham was a CDC worker who died from suicide a few years ago. I don’t have the science background to call BS on this post but maybe Mr Latham or Ms Wilson or someone on this comment list does.

  • The world must determine how this virus started. If there is anything already known about its disposition in the laboratory environment, those involved owe humanity a full accounting. There is absolute nothing racist about investigating the WIV as a potential source of the virus. People who are considering this possibility are not indicting Chinese as an ethnic group, but rather the institutions possibly responsible for this calamity. The US government has its fair share of skeletons in the closet, but even this doesn’t reflect fairly on the citizenry of the USA. Bad things happen in life and we need learn from each lesson or face the risk of repeating the mistakes of others.

  • Thank you for this interesting article. What about recent findings that indicate occurrence of the virus in Barcelona as early as March 2019? Would that conflict with your theory or in essence just put an earlier date on the escape-from-lab?

    “Sentinel surveillance of SARS-CoV-2 in wastewater anticipates the
    occurrence of COVID-19 cases”

    • The Barcelona data is quite an outlier. It seems very preliminary and contamination has to be strongly suspected. The actual sequence of the virus that they found might well answer the question. If true, it opens up several possibilities. I believe others in other places have looked at older samples and I don’t know exactly what they found. A key question would be whether this finding was special to Barcelona.

  • Why is no consideration given to the possibility that the SARS-CofV-2 virus escaped from our own demonstrably leaky USAMRIID lab at Ft. Detrick? For a discussion of that possibility, see

  • Thank you for this. In 2012 I co-authored, with Peter Daszak and others, an editorial in EcoHealth which in part was critical of gain of function studies (though we used different language) see My recollection is that Peter was originally resistant to the cautionary note I was able to introduce to that editorial. My priority was the risk, Peter thought the benefits were far more plausible and important. Eight years later I am personally unaware of significant benefits flowing from such gain of function research, but even more concerned about the risk. I thought COVID-19 could have been engineered very early (check my twitter statements) because I was incredulous one so infectious to humans could have evolved “naturally”. Like others, the protests of researchers like Peter Daszak and Jeremy Farrar (head of the Wellcome Trust) left me sceptical – how could they “know” for sure it wasn’t engineered? Also, they had clear conflicts of interest – to maintain their entry to China and (perhaps) to protect their Chinese collaborators from censure. I could be wrong, but at the very least the laboratory theory remains plausible, and the reasoning that it must be “natural” is unconvincing to me.

  • Thanks, Dr. Latham

  • Great article- Explained the situation as a scientist, no politics.

  • Excellent article. Great research and a much better understanding of the probable origins of COVID-19.

  • Mr. Butler, what is your twitter handle? I’d like to follow. Thank you for speaking up.

  • This is one of the best articles I have read in a long time. Everything is clearly explained and even I understand the information (I am not a scientist). Good job!

  • I personally did a lengthy analysis using references from over 100 journal articles. It appears that the virus is man-made using Directed Evolution, the technology resulting in the 2018 Nobel Prize in chemistry.

    I published the analysis in a preprint article at

    There are a number of issues. There are about half-a-dozen amino acids that differ in key locations between the 2002 SARS virus and this one. These are the ones that attach the virus to the ACE2 receptor. However, there is strong selection pressure against any of these changes individually. With all changing simultaneously, the backbone becomes more flexible and the new shape makes it more effective than that of SARS. Simultaneously, disparately located amino acids are very difficult to change with simultaneous mutations. This is trivial for directed evolution. A pangolin virus is held up as having the same sequence as people. There is a problem here. Tests show that the static field of the backbone with these amino acid changes is different. This change prevents the normal cleavage site of the spike from being effective. However, the new virus has is what is called a polybasic cleavage site which does not appear in the earlier SARS virus. This addition overcomes the static interference of the new backbone. In other words, without the polybasic cleavage site, the new backbone can’t infect. The pangolin virus does not have one. This raises the question of whether the pangolin virus genome as published is even capable causing an infection. For more details, the article might be considered.

  • I noticed it purchasing a ticket to Wuhan. Rather peculiar, I thought

  • Thank you so much for compiling and presenting your research in this paper. I was beginning to feel alone in my search for truth and evidence of critical thinking. I understand the scope of this presentation does not include the possibility of pernicious motive, but an independent investigation should not dismiss the possibility of intentionality.

  • Hear, hear, Patrick. Whom do you have in mind?

  • Every MD I ask has told me Covid-19 came from a Lab, they say the structure has too many coincidences to be believed, one even used the analogy “if you blow up enough libraries eventually one day in the resulting wreckage of one of them you will find a perfect set of encyclopedias” if you believe that then you might believe its a natural virus. I asked about intentions, they leaned toward accident.

  • Has anyone seen an answer to this June 12 Business Insider piece claiming that the virus could not have been man-made?

    Following is a transcript of the video.

    Narrator: COVID-19 myths have spread just about as quickly as the disease itself, but one myth in particular just won’t go away: that SARS-CoV-2, the virus that causes COVID-19, isn’t naturally occurring and was actually manmade. In fact, one substantial survey found that almost 30% of Americans believe that this virus came from a lab.

    But scientists believe that they can confidently say that the virus wasn’t created by humans and the myth going around is nothing more than that, a myth. So how do they know with such certainty? The key is in the virus’s genetic code. This is the genomic sequence for SARS-CoV-2.

    It was decoded in January 2020, just weeks after the world started to learn of this novel coronavirus. Each of those letters is a genetic building block known as a nucleotide, and when built up, they form an organism’s genetic code, which we can use to understand them. Each organism has a different code and a varying amount of nucleotides. A human has about three billion of them, whereas a virus, such as SARS-CoV-2 has about 30,000. Your genetic sequence can give information about your hair, eye color, sex, and lineage. And just like your genes give clues about who and where you come from, scientists can use a virus genome sequence to help explain where that virus originated as well. An ancestry test for viruses, if you will.

    Robert Garry: We honed in on the parts of the virus that we thought were unique and that might play a role in the evolution of the virus, but also in the pathogenesis of it. And a couple of things stood out pretty quickly when we starting to compare with the other coronaviruses that have come before.

    Narrator: That’s Robert Garry, a professor of Microbiology and Immunology at Tulane University. Along with his colleagues, he used the virus sequence to try and understand where SARS-CoV-2 came from. They first looked at the virus’s backbone. That’s the whole genomic structure, unique to each virus, like a viral template. Simplified, the backbone for SARS-CoV-2 and its 30,000 nucleotides looks a little bit like this.

    Each section is responsible for a part of the virus. For example, this one is responsible for the spike proteins you may have seen lining the virus shell. So it may not come as a surprise that to engineer a virus in a lab, you would need to start with a backbone. But to manufacture from scratch the backbone of a virus that can also cause disease is almost impossible.

    Garry: I mean, people just don’t know enough about what makes a virus pathogenic to be able to assemble that. How you pick amongst all the possibilities to get to that last little bit that’s gonna turn it into this worldwide pathogen, which sequences do you think about to put in there?

    Narrator: Simply, there is just not enough knowledge about how to make a new virus that would also cause significant devastation, like SARS-CoV-2 has. So creating a new, deadly backbone is pretty much impossible. But there is another way the novel coronavirus could have been created in a lab, and that would be using an existing virus backbone or genetic sequence as a starting point.

    With a recycled backbone, two main methods could have been used to create the new virus. They could’ve either quickly mutated it, or added and deleted parts of the existing virus. But additions and deletions in a virus leave a trace that can be pointed out pretty quickly, a little bit like removing a red brick from a wall and replacing it with a black brick. This is exactly what Maciej Boni, an associate professor at Penn State, looked for.

    Maciej Boni: You might see an insertion that looks unusual, and you look out in nature and you see that no other viruses have genetic insertions like that. We did not see any genetic insertions that are not also identified in nature. So there’s no evidence suggesting that it was manmade or laboratory created somehow.

    Narrator: So what if they went with the other option and mutated an existing virus? This is known as serial passage and acts in a similar way to selective breeding. Scientists are able to mimic evolution, to a degree. By forcing the virus to mutate over and over again into a potentially different form. This can be used to weaken a virus, which is how some vaccines have been made, or to strengthen a virus, say, by making it more transmissible.

    But for this to work, the existing virus would have to show significant genetic similarity to the new virus. In fact, they would have to be almost identical. Because this process only speeds up viral evolution and has a limit, it’s not possible to direct mutations into a completely different form. Yet Garry and his team found that the backbone for SARS-CoV-2 was strictly unique, differing significantly from other coronaviruses.

    For example, SARS-CoV, the first SARS, has only about a 79% genetic sequence match to SARS-CoV-2. So it’s ruled out. The best candidate is RaTG13, a bat coronavirus with a 96% gene sequence similarity.

    Garry: Now, 96% sounds pretty close, but in genetic terms, that’s actually a pretty long ways away.

    Narrator: To put it in perspective, humans and chimpanzees share 99% of the same genome. And you may have noticed there’s still a large difference between the two. For SARS-CoV-2 and RaTG13, that 4% is the difference of about 800 nucleotides, or about 50 years of natural evolution.

    Garry: 800 is too big a barrier. You have something that was 99.5% or 99.7% similar, maybe only 20 or 30 nucleotides, you might get away with it, you might be able to manufacture that, doing it in the lab.

    Narrator: But it just wouldn’t be possible with current knowledge and existing viruses. There’s also another part of the gene sequence that helped Garry and his colleagues learn about the natural origins of SARS CoV-2. In particular, this set of nucleotides in the gene sequence. You might remember those from earlier. They’re responsible for the virus spike proteins, the pointy, claw-like arms lining the outside of the virus that give it its distinctive appearance, and coronaviruses their name.

    Specific viruses, including coronaviruses, use these arms to enter and take over host cells. But this piece of the spike protein helped tell the researchers that this virus originated in nature. This set of nucleotides relates to the receptor binding domain, or RBD. That’s the part that latches on to the receptors on targeted cells. As viruses can only survive when inside other cells, this is a vital section that you would have to focus on if you were to make a virus in a lab. Garry and his team found the RBD has evolved specifically to bind to the human cell ACE2, a receptor usually used to help regulate blood pressure.

    But it’s the way it so successfully binds to the ACE2 receptor that is crucial. You see, when a scientist tests what aspects would make a virus more potent, they run models through computer simulations. But when researchers put this sequence through those simulations, they found that SARS-CoV-2’s RBD shouldn’t be successful at all and would actually cause poor efficiency in transmission, which we know is not the case.

    Garry: Yeah, by working in the lab or working with the computer, trying to figure it out, we just would not have come up with this particular way to have this virus bind to this receptor, a very important part of the whole replication process.

    Narrator: In other words, if your goal was to make a virus to infect humans, you wouldn’t have chosen this one.

    Garry: Basically, what nature has done is come up with a solution for binding that is better than any computer and also way better than what any scientist could come up with.

    Narrator: So we know why scientists confidently say SARS-CoV-2 wasn’t made in a lab, but that’s not the end of the story. It’s also been rumored that SARS-CoV-2 was a known virus that was accidentally leaked from a lab. Now, we can’t say for certain this isn’t the case, but it’s highly unlikely. For one, this virus wasn’t sequenced before January 2020. And if it was, the world would know because the Wuhan Institute of Virology was specifically looking for something like this in order to protect the world from any outbreaks.

    Garry: If they would have come up with a SARS coronavirus that was 76% similar to the original SARS one. I mean, they would have published that as fast as they could. That would have been, at least in the scientific world, very big news.

    Narrator: But it’s also just statistically highly unlikely.

    Garry: So just out in nature there, literally billions of people that are having millions of encounters with these animals. And, you know, we’re talking about a handful, a few dozen, maybe, in the whole world are scientists that go out and trap bats. So just on the odds of the thing, it’s just a minuscule chance that it was this one scientist that accidentally infected himself in this very sophisticated laboratory setting.

    Narrator: So SARS-CoV-2’s origin is no longer a mystery. But where and how it jumped in nature, well, that’s a question many are still trying to answer.

  • Jonathan and Allison, This is the most comprehensive tracking of the details and well researched and cited thank you for your work. Proper journalism still exists. As for your concluding paragraph I’ve been asking myself the same question since realising that they were using this justification for the research. It occurs to me that the justification is a white-wash for underlying other reasons for the research.

  • To Mike B, my twitter handle is @ColinDavdButler

  • People subscribing to comments might want to see our new article:
    A Proposed Origin for SARS-CoV-2 and the COVID-19 Pandemic

  • To Mark, responding to a few comments above. Garry’s article is available free at .
    About half-a-dozen comments above yours, I mentioned an article I posted in preprint at
    https://osf.i0/us58 .
    This article is actually a rebuttal to Garry’s article. If you read his in the light of my analysis I believe you will be disappointed in the quality of argument he presented.

  • Any book coming out about this “Conspiracy”

  • Norwegian and British vaccine scientists have published unequivocal evidence that SARS-CoV-2, the coronavirus responsible for the COVID-19 pandemic, is man-made.

    The authors state two conclusions: (1) the mutations that would normally be seen in the course of animal to human transmission have not occurred in SARS-CoV-2, indicating that it was fully “pre-adapted” for human infection and (2) SARS-CoV-2 has insertions in its protein sequence that have never been detected in nature and contribute to its infectivity and pathogenicity.

  • Thanks! Very intriguing article with solid scientific reasoning. I am Chinese currently in China and can provide my own account here:

    Right around Chinese new year time, before the internet was heavily censored by Chinese government, there was a lot anger toward government oppression against Wuhan whistle-blower doctors, and there were some quite credible “rumors” circulating among wechat friend circles, among which there was a particularly interesting one that got my attention and I actually did some research.

    It was believed that the staff member who carried the virus was a young female graduate researcher Yanling Huang, and she died from the infection and was deemed patient zero back then. I checked the WIV website and found Yanling Huang’s introduction page was removed, but some traces of her such as class enrollment list can still be found by doing a search on the website. Later on the Chinese official TV claimed that “Yanling Huang” graduated from WIV several years ago and is now working happily as a researcher in a pharmceutic start-up, and her boss showed up to say that she was well and happy. However, Yalin Huang herself never showed up or spoke in public, odd, huh?

  • note the quote here “And if it was, the world would know because the Wuhan Institute of Virology was specifically looking for something like this in order to protect the world from any outbreaks.”. To me this is a clear indication that the interview was a paid program by CCP, I am sure even most of Chinese like me will not believe that WIV’s motive is to “protect tthe world from any outbreaks”. Most of Chinese know that the director of WIV is a young wife of an big shot in Chinese academia circle, and many have openly questioned her qualifications…

  • New Preprint provides further evidence:

  • Yesterday a prominent Chinese virologist from Hong Kong who fled China and did early work on the Coronavirus said the genome pattern indicates the origin was a laboratory. And has promised more paper on the assertion. The Chinese Communist Party has tried to silence her and she is in hiding. But recently interviewed on Fox. The entire rest of the news media so far in the last 48 hours have ignored the story. She promises more paper on the subject in the near future. I highly suspect the WHO and most of the scientific world has been in complicit propaganda on this all along. People with unimpressive credentials in a chorus denied laboratory origin could be possible. Really? Remember the SARS virus escaping from a Chinese laboratory? Did they forget that? And the laboratory in Wuhan was criticized before this crisis for not having the properly trained staff for such a high containment facility. It’s amazing how much information is censored. How much is hidden from us. Soon the entire world will be like China. All of our news will be filtered and controlled.

  • Researchers are so quickly to call it ridiculous and a conspiracy theory because they get funding for the type of research done in these labs. So to blame a lab would be taking food off their table. Their quick dismissal is suspect and should make this more of a possibility than a conspiracy theory. If they cannot find the intermediaries in the natural progression then how can they claim it is definitely natural? That is a huge leap especially with so many “coincidences” surrounding the history of this virus so far. I believe in maybe one coincidence but there are so many that makes it extremely suspect and nefarious with so many quickly to squash it without a moments thought or proof to save their careers.

  • Journal of Clinical Microbiology
    2008 May 46(5) pp 1734-40
    Y Wei and C Yang et al

    Mention of SarsCov2 and SarsCov3 in this paper (apparently catalogued by NIH)

  • This article provides more perspective to this argument:

    A troubling aspect of the pandemic concerns the military’s involvement with vaccines, treatments.

  • Where is the data? This article does an excellent job of setting up the story but there is no data whatsoever. It’s a great hypothesis but it’s not based on any SCIENTIFIC evidence. Go into NCBI yourself and do a BLAST on the viral sequence. When I did this in spring 2020, it matched dozens of naturally occurring viruses that had been sampled in bats.

  • a few questions: Yuri Deigin says RaTG13 does NOT have RBM of SARSCoV2 – you do in your July 15 2020 article – – which is correct please? Also you say 10-20X affinity of spike protein for SARSCoV2 vs SARS1 – is this still considered to be true? Others say because MERS is in a different ‘family’of B-coronaviruses, it’s furin cleavage site is very very unlikely to have ‘naturally’ located itself into what is now SARSCoV2’s genome where it is located. What are your thoughts please? I am a short COVID-19 Simplified book so, answers to these questions would help. Thank You, Conrad Miller MD – you can send any help answers to [email protected]

  • forgot the word ‘writing’ a short book on COVIS-19

  • It is a very documented article which changes my idea about refusing the laboratory origin specially the documentation of already published papers about passiging and lack of safety inside WIV. Indeed it is a great work. Congratulations.

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