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Covid-19 lab leak theory can't be ruled out, say scientists

A group of leading scientists says more investigation is still needed to determine the origin of the pandemic

In this file photo taken on February 03, 2021 Peter Daszak (right), Thea Fischer (left) and other members of the World Health Organization (WHO) team investigating the origins of the COVID-19 coronavirus, arrive at the Wuhan Institute of Virology in Wuhan in China's central Hubei province. (AFP)

London, Reuters: The origin of the novel coronavirus is still unclear and the theory that it was caused by a laboratory leak needs to be taken seriously until there is a rigorous data-led investigation that proves it wrong, a group of leading scientists said.

COVID-19, which emerged in China in late 2019, has killed 3.34 million people, cost the world trillions of dollars in lost income and upended normal life for billions of people.

"More investigation is still needed to determine the origin of the pandemic," said the 18 scientists, including Ravindra Gupta, a clinical microbiologist at the University of Cambridge, and Jesse Bloom, who studies the evolution of viruses at the Fred Hutchinson Cancer Research Center.

"Theories of accidental release from a lab and zoonotic spillover both remain viable," the scientists including David Relman, professor of microbiology at Stanford, said in a letter to the journal Science.

The authors of the letter said the World Health Organization's investigation into the origins of the virus had not made a "balanced consideration" of the theory that it may have come from a laboratory incident.

Also read: Scientists work out ways to prevent next pandemic

The ultrastructural morphology exhibited by the 2019 Novel Coronavirus (2019-nCoV), which was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China, is seen in an illustration released by the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia, U.S. January 29, 2020.
The ultrastructural morphology exhibited by the 2019 Novel Coronavirus (2019-nCoV), which was identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China, is seen in an illustration released by the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia, U.S. January 29, 2020. (via REUTERS)

In its final report, written jointly with Chinese scientists, a WHO-led team that spent four weeks in and around Wuhan in January and February said the virus had probably been transmitted from bats to humans through another animal, and that a lab leak was "extremely unlikely" as a cause.

But there are myriad different ideas about the origin of the virus including a series of conspiracy theories.

"We must take hypotheses about both natural and laboratory spillovers seriously until we have sufficient data," the scientists said, adding that an intellectually rigorous and dispassionate investigation needed to take place.

"In this time of unfortunate anti-Asian sentiment in some countries, we note that at the beginning of the pandemic, it was Chinese doctors, scientists, journalists, and citizens who shared with the world crucial information about the spread of the virus—often at great personal cost."

(Reporting by Guy Faulconbridge; Editing by Kate Holton and Giles Elgood for Reuters)

Also read: Scientists focus on bats for clues to prevent next pandemic

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