Covid: Top Chinese scientist says don't rule out lab leak

BEIJING, May 30 (BBC): The possibility the Covid virus leaked from a laboratory should not be ruled out, a former top Chinese government scientist has told BBC News.
As head of China's Centre for Disease Control (CDC), Prof George Gao played a key role in the pandemic response and efforts to trace its origins. China's government dismisses any suggestion the disease may have originated in a Wuhan laboratory. But Prof Gao is less forthright.
In an interview for the BBC Radio 4 podcast Fever: The Hunt for Covid's Origin, Prof Gao says: "You can always suspect anything. That's science. Don't rule out anything."
A world-leading virologist and immunologist, Prof Gao is now vice-president of the National Natural Science Foundation of China after retiring from the CDC last year.