Coronavirus origins: the debate flares up, but the evidence remains weak

The location of the initial outbreak close to the Wuhan Institute of Virology drew suspicion that it may have been a lab leak. But scientists largely came out in favour of a natural spillover from bats to humans, through an intermediate animal host, at the Huanan seafood market located a few kilometres away. To date, though, no immediate ancestor of SARS-CoV-2 has been found in bats nor in any other animal that was on sale at the market.

A recent preprint (a study yet to be peer-reviewed) claims to have identified possibly unusual sequence patterns in the SARS-CoV-2 genome. These patterns may indicate the virus was genetically modified in a lab.

Source: Coronavirus origins: the debate flares up, but the evidence remains weak

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