Presenter: John Sudworth Series Producer: Simon Maybin Editor: Richard Vadon Commissioning Editor: Dan Clarke But it's a debate that's become politicised, toxic, and a bit crazy. It might also help us prevent another - maybe even worse - pandemic. So, where did Covid come from? For every one of the millions of lives lost, for every long sufferer, for the pain, the isolation, and the incalculable economic cost, the answer matters. For them, the mystery of Covid's origin remains unsolved. And other scientists claim there's uncertainty. But an alternative possibility - that it leaked from a laboratory - has refused to go away. 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. From the beginning, there have been claims of certainty. Since then, he's been investigating the origin of the virus that would turn into a devastating global pandemic. 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.
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