Cover-ups, coincidences, and conspiracy theories: where did Covid come from?
John Sudworth was the BBC's China correspondent when an unexplained pneumonia started worrying Wuhan doctors in December 2019. Since then, he's been investigating the origin of the virus that would turn into a devastating global pandemic.
From the beginning, there have been claims of certainty. Many scientists say the virus that causes Covid came from nature - probably carried from bats to other animals, and then to humans in a Wuhan market.
But an alternative possibility - that it leaked from a...
The Covid-19 pandemic has been one of the weirdest things any of us has lived through. But there was another sickness that once stalked the nation and turned things very strange for a while.
Published 10/18/23
Speculation that newly declassified US intelligence will contain smoking-gun evidence.
Three years on from the start of the pandemic, the FBI - the US domestic intelligence agency - reveals it sees a lab leak in Wuhan as the most likely source of Covid. Weeks later, the US Congress passes a law...
Published 07/18/23