The Chinese virology institute in the city where COVID-19 first emerged has three live strains of bat coronavirus on-site, but none match the new contagion wreaking havoc around the world, its director has said.
Scientists think COVID-19 — which first emerged in Wuhan and has killed more than 340,000 people worldwide — originated in bats and could have been transmitted to people via another mammal.
However, the director of the Wuhan Institute of Virology told state broadcaster China Global Television Network that claims made by US President Donald Trump and others that the novel coronavirus could have escaped from the facility were “pure fabrication.”
In an interview filmed on May 13 and broadcast on Saturday night, institute director Wang Yanyi (王延軼) said the center has “isolated and obtained some coronaviruses from bats.”
“Now we have three strains of live viruses ... but their highest similarity to SARS-CoV-2 only reaches 79.8 percent,” she said, referring to the coronavirus strain that causes COVID-19.
One of the institute’s research teams, led by virologist Shi Zhengli (石正麗), has been researching bat coronaviruses since 2004 and focused on the “source tracing of SARS,” the strain behind another virus outbreak 17 years ago.
“We know that the whole genome of SARS-CoV-2 is only 80 percent similar to that of SARS. It’s an obvious difference,” she said. “So, in Professor Shi’s past research, they didn’t pay attention to such viruses, which are less similar to the SARS virus.”
Conspiracy theories that the biosafety lab was involved in the outbreak swirled online for months before Trump and US Secretary of State Mike Pompeo brought them into the mainstream by claiming that there is evidence that the pathogen came from the institute.
The lab has said it received samples of the then-unknown virus on Dec. 30 last year, determined the viral genome sequence on Jan. 2 and submitted information on the pathogen to the WHO on Jan. 11.
Wang said in the interview that before it received samples in December, the team had never “encountered, researched or kept the virus.”
“In fact, like everyone else, we didn’t even know the virus existed,” she said. “How could it have leaked from our lab when we never had it?”
The WHO said Washington had offered no evidence to support the “speculative” claims.
In an interview with Scientific American, Shi said the SARS-CoV-2 genome sequence did not match any of the bat coronaviruses her laboratory had previously collected and studied.
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