Opinion: Press release about "Coronavirus Origin Study" by Prof. Wiesendanger and Hamburg University

February 22, 2021
Andrea Thorn and Sam Horrell

“The coronavirus has led to a worldwide crisis for over a year. In a new study, nanoscientist Prof. Dr. Roland Wiesendanger illuminates the origins of the virus. His findings conclude there are a number of quality sources indicating a laboratory accident at the Wuhan Institute of Virology as the cause of the current pandemic.”

This is the beginning of an official press release from the University of Hamburg. Unfortunately, this study is not a study at all, but a rather confusing piece of internet research. And because we, the Coronavirus Structural Task Force, conduct research at the very same University of Hamburg, we would like to comment on the press release and this "study".

Screenshot der "Studie"
Pages from the publictaion (R. Wiesendanger / UHH)

Here are the main arguments of the author, Roland Wiesendanger:

#1: Failure to identify the interim host proves that the disease is not of animal origin.

“In contrast to early coronavirus-based epidemics such as SARS and MERS, the scientific community has yet to identify the interim host that made the transmission of SARS-CoV-2 from bats to humans possible. Thus, there is no sound basis for a zoonotic theory as a possible explanation for the pandemic.” That an interim host of a zoonosis is not immediately identified is not unusual. The route of transmission of SARS-CoV was not elucidated until more than three years after the SARS pandemic ​[1]​; for MERS, which was first described in 2012, it took two years [2] and to date some information is still missing ​[2–4]​. Evidence indicates that interim hosts for SARS-CoV-2 may have been snakes, turtles, or pangolins ​[5–7]​. Furthermore, transmission between humans and various animal hosts has been demonstrated several times (which, for example, unfortunately led to the culling of many mink)​[8]​. The lack of knowledge of an intermediate host does in no way disprove zoonosis as a cause.

#2: SARS-CoV-2 is so adapted to humans that it could not have arisen naturally

“The SARS-CoV-2 viruses are astonishingly effective at binding to human cell receptors and infecting human cells, thanks to its special cell receptor binding domains combined with a special (furin) cleavage site of the coronavirus spike protein. This is the first time a coronavirus has had both of these characteristics and indicates a nonnatural origin of the SARS-CoV-2 pathogen.”

The ability of the virus to bind to human cells with the spike protein is not evidence that this was artificially produced. Influenza, HIV, and Ebola are also all very good at binding to human cells ​[9]​ - the latter two have been shown to be animal-derived (zoonotic) pathogens. All of these viruses possess a furin cleavage site. Furins are enzymes found in all vertebrates that allow viruses to better target vertebrate cells. Thus, it is not unusual for SARS-CoV-2 to have evolved such a site through natural mutation and selection. In fact, it occurs naturally in many other coronaviruses as well ​[10]​.

The receptor binding domains S1 and S2 are highly variable because it is exactly domains that enable specific binding to host cells - the new mutations that are currently causing us so much trouble display variations right here. Mutations in this domain arise due to selection pressure in humans (or other hosts) and are also not indicative of a non-natural origin ​[11,12]​.

What also speaks against the virus being completely man-made, is that the sequence of the virus does not fit known methods for artificially producing genetic material ​[13,14]​. Furthermore, designing a coronavirus would be considerably costlier than designing many other viruses because the genome is so large. This however, does not exclude the virus originating from a "gain-of-function" study.

Ausschnitt aus Animation, wie das Virus an die Wirtszelle bindet
Scene from animation showing how the virus binds a host cell; the virus is at the upper edge with spikes in green; ACE2 receptors are shown in purple. To see the whole animation, please click here. (Picture: Janet Iwasa / University of Utah and Coronavirus Structural Task Force)

Here it is perhaps worth noting that Professor Wiesendanger authored the study alone and is himself a non-specialist ​[15]​. He has never published on Corona before, and therefore it is understandable that he is unfamiliar with both the details of genetic engineering and the technical terminology.

#3: Bats do not fly 2000km

“There were no bats for sale at the wet market in the center of Wuhan, which is the suspected hub of the outbreak. The Wuhan Institute of Virology, however, houses one of the largest collections of bat pathogens in the world, taken from distant caves in southern Chinese provinces. It is extremely unlikely that bats naturally made their way to Wuhan, from almost 2,000 km away, to then start a worldwide pandemic in the immediate vicinity of the Wuhan Institute of Virology.”

Considering that the thesis supported by WHO ​[16]​ is that there must have been an intermediate host, as is indeed also stated in the study and the press release (see 1.), the presence of bats near the first human vectors is not necessary. Many of the possible intermediate hosts were traded in the market in question. So far, there is no certainty that the pandemic originated there - research is still ongoing - but the absence of bats does not argue against zoonosis. The collection of bat viruses at the Center for Emerging Infectious Diseases in Wuhan does exist however. A researcher at this institute - Shi Zhengli - discovered that SARS originated from bats, and she conducted a systematic study of bat viruses from fecal samples in 2013, for example ​[17]​. While the samples in question have been found in a cave 2000 kms from Wuhan, the bat in question (Rhinolophus affinis) does occur far and wide, including 250 km from Wuhan, in Hunan province. Bats have long been considered the largest source of different coronaviruses and thus the greatest risk for their transmission to humans ​[18]​.

#4: Research on viruses as bioweapons was conducted in Wuhan

One research group at the Wuhan Institute of Virology had been researching the genetic manipulation of coronaviruses for many years with the goal of making these more infectious, more dangerous, and more fatal. This has been demonstrated by numerous publications.”

The publications cited in the study, for example this one ​[19]​, are indeed concerned with the recombination of bat coronaviruses with spikes that can bind to human cells. These were used to trace how the 2002/3 SARS pandemic originated - not to make the virus more dangerous. Such research has taken place elsewhere - with many strict safety measures and safeguards - for example in North Carolina ​[20]​.

#5: The virological institute in Wuhan was not secure.

“Safety measures were documented as being insufficient at the Wuhan Institute of Virology prior to the outbreak of the coronavirus pandemic.”

The laboratory in Wuhan is a Biosafety Level 4 laboratory ​[21]​, the highest level - there are only a handful of such laboratories in the world, of which two are in China. Such labs have strict access controls, you have to be able to hermetically seal them off, and they are under negative pressure to prevent pathogens from escaping; access is only through an airlock; all wastewater is chemically and thermally treated; a full protective suit has to be worn, and when leaving, the whole body has to be cleaned with soap. Of course, no laboratory is perfect, but safety is a paramount issue in such laboratories ​[21]​. Nature has written a special report on the lab in Wuhan that illustrates this. In the text, Prof. Wiesendanger argues with a serious article from the Washington Post that points to episodes of malpractice in the laboratory in Wuhan, but whose sources remain undisclosed. Another source, a Youtube video, supposedly proves the improper disposal of laboratory equipment. However, while garbage can be clearly seen, typical laboratory waste such as pipette tips, consumables and gloves, is missing. Furthermore, the Chinese text of the video does not mention the waste in any way, it is about whether and how one could get into the building. A second source ​[22]​ shows a bat allegedly being sampled without protective equipment. Parts of the video, which is about a new coronavirus in pigs, show the non-BSL-4 area of the lab. The new coronavirus in pigs is said to come from the bat species shown. Nothing in this video suggests biosecurity problems in the lab.

Bilder eines CCTV Videos zu Wuhan, Fledermäusen und Corona bei Schweinen
Scenes from the laboratory video by CCTV. Left: Photograph of a bat which can serve as intermediate host for corona in pigs. Right side: Take from the Insitute of Virology in Wuhan (Pictures: CCTV).

6. Authorities covered up a laboratory accident in October

“There are numerous direct indications that the SARS-CoV-2 pathogen is of laboratory origin and point to a young researcher at the Wuhan Institute of Virology as being the first person to be infected. In addition, there are indications that the SARS-CoV-2 pathogen emerged from the Wuhan Institute of Virology into the city of Wuhan and beyond. There are also indications that the Chinese authorities conducted an examination of the institute in the first half of October 2019.”

The "indications of an official examination in the first half of October" are based on an analysis of mobile phone location data that an external firm is said to have produced for the Pentagon to show disruption of laboratory operations and road closures. However, the report provides no concrete evidence and was therefore deemed insufficient by the intelligence community. Especially since some of the allegations could be directly refuted ​[23]​. Little can be found on the Internet about the young scientist, Yan Ling Huan, apart from a Twitter account, videos, and a rebuttal from the lab. The hypothesis that she was the first to be infected can therefore neither be proven nor disproven.

All in all, one cannot rule out the lab as the point of origin - research is being done on coronaviruses there - but the sources cited in this "study" are not evidence of that. Circulation of the virus before December cannot be ruled out either, but the publication does not present any robust evidence.

Additional notes

The main problem with this study is that it appears to have been written by the author alone and was not peer reviewed. This is particularly regrettable since the author emphasizes the importance of peer review on page 3. Apparently, discussion and especially media attention are very desirable, but peer review is not, which is why the "publication" was done on the Research Gate platform, where you can simply upload a PDF.

BILD Schlagzeile zu Pressemitteilung
This is what the results of a successful press release look like: Title page of the Germen newspaper Bild on the morning after the press release(19.2.2021). Picture by Springer-Verlag.

Other problems with the "study" are the poor readability and deficiencies in the evidence - this document is not only confusing, but also does not comply with good scientific practice. Sources include not only private communications and Twitter posts, but also content from the Alt-Right movement, such as an unrefereed study ​[24,25]​ from Steve Bannon's entourage, articles from the Epoch Times ​[26]​ or Summit News ​[22]​. The document is also full of contradictions – for example, the first patient is said to have fallen ill on the first of October 2019, but elsewhere it says that the pandemic is due to a laboratory accident between October 6 and 11, 2019. The use of colored markers in the text also does not necessarily contribute to readability and is uncommon in publications. It is not clear why such a highly decorated and well-known scientist as Prof. Wiesendanger considered such writing publishable or even a study; and, unlike many of his colleagues, he does not do research on the coronavirus.


What comes across as an invitation to debate is a rather disorderly and angled piece of internet research that does not correspond with good scientific practice. Many people who are against China, or who are simply looking for someone to blame for Corona, feel vindicated and the University of Hamburg backs this up.

It is good and right that professors at German universities can publish and research whatever they want ("Forschungsfreiheit"). But the fact that this article is published in close consultation with the president ​[15]​ but without peer review and in the name of the university does not cast a good light on the University of Hamburg, which is, after all, our very own scientific home. Our statements here are about the shortcomings of this press release as well as the paper, and are not intended as criticism of Prof. Wiesendanger personally; we deeply regret this press release. As scientists, we should educate, critically question - and allow ourselves to be questioned. For the last twelve months, we have been informing colleagues and the general public about ongoing corona research, taken care not to accept funding from potential influencers (e.g. the pharmaceutical industry), and carefully reviewed every blog post, no matter how small. Every day we respond to inquiries from people who are confused, afraid of corona or of the measures being put in place. We teach, educate, we answer questions.

And that is what we will continue to do.

I would like to thank Dr. Florian Platzmann, Dr. Sam Horrell, Dr. Yunyun Gao, Pairoh Seeliger, Lea von Soosten, Katharina Hoffmann, Joshua Ezika and Sabrina Stäb for their help writing this article. Their expertise in lab safety, public health care, mandarin, molecular biology and their comprehensive internet / literature research made this opinion piece possible.

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Tristan Croll

Postdoctoral Research Associate @ Cambridge Institute for Medical Research, University of Cambridge
Tristan is a specialist in the modelling of atomic structures into low-resolution crystallographic and cryo-EM density, and developer of the model-building package ISOLDE. His focus in the project is on correcting the various errors in geometry and/or chemical identity that tend to occur in less well-resolved regions, with the overall aim of bringing the standards […]
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Gianluca Santoni

Serial Crystallography Data Scientist @ European Synchrotron Radiation Facility, Grenoble, France
Gianluca is an expert in protein crystallography data collection and analysis. After a PhD in structure-based drug design, he has worked as a postdoc on the beamline ID23-1 at the European Synchrotron Radiation Facility (ESRF) and has developed the SSX data analysis software ccCluster. His current interests are the optimization of data collection strategies for […]
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Yunyun Gao

Postdoctoral Research Associate in the AUSPEX Project @ Institute for Nanostructure and Solid-State Physics, Hamburg University
Yunyun is a method developer for strategies of analysing data from biomacromolecules. Before joining the Thorn group, he had been working on SAXS/WAXS of polymers and proteins. He is interested in improving objectivity and reliability of data analysis. Yunyun is currently extending the functionality of AUSPEX. He is the repository manager and AUSPEX handler for […]
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Johannes Kaub

Scientific Coordinator @ Institute for Nanostructure and Solid-State Physics, Hamburg University
Johannes Kaub studied chemistry at RWTH Aachen, with a focus on solid-state physical chemistry, before serving as a scientific employee at the Max Planck Instiute for the Structure and Dynamics of Matter. He supports the Coronavirus Structural Task Force as a scientific coordinator with his organizing ability and his talent for solving problems. Other than […]
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Andrea Thorn

Group Leader @ Institute for Nanostructure and Solid-State Physics, Hamburg University
Andrea is a specialist for crystallography and Cryo-EM structure solution, having contributed to programs like SHELX, ANODE and (a little bit) to PHASER in the past. Her group develops the diffraction diagnostics tool AUSPEX, a neural network for secondary structure annotation of Cryo-EM maps (HARUSPEX) and enables other scientists to solve problem structures. Andrea is […]
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2 comments on “Opinion: Press release about "Coronavirus Origin Study" by Prof. Wiesendanger and Hamburg University”

  1. All Roland Weisendanger presented is his scientific judgment, which is at the same level as those who judged it is not from lab. It goes without saying, open a thought should never be forbidden, but rule out a possibility must be careful.

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