Coronavirus not leaked from lab, most likely to natural origin: Study

The SARS-CoV-2 virus, which causes Covid-19, most likely spread from an animal source to humans, and did not leak from a laboratory in Wuhan, China, according to a review of existing scientific evidence by a global team of scientists.

The yet-to-be-published study, posted on the pre-print server Zenodo on July 7, noted that while a laboratory accident "cannot be entirely dismissed", there currently exists zero evidence for such a lab origin of the virus behind the Covid-19 pandemic. Amid a global debate around the origins of the deadly virus, 21 eminent scientists from universities and research institutes around the world reviewed the current scientific evidence to help clarify the source of the virus.

 "Our careful and critical analysis of the currently available data provided no evidence for the idea that SARS-CoV-2 originated in a laboratory," Professor Edward Holmes from the University of Sydney in Australia said in a statement. "There is no evidence that any early cases had any connection to the Wuhan Institute of Virology (WIV), in contrast to the clear epidemiological links to animal markets in Wuhan," the authors of the paper noted. There is also "no evidence that the WIV possessed or worked on a progenitor of SARS-CoV-2 prior to the pandemic," they added.

On the other hand, the authors of the study noted, there is substantial body of scientific evidence supporting a zoonotic origin for SARS-CoV-2.

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