Fierce debates about the origins of the Covid pandemic were reignited today after two new studies claimed to trace the outbreak back to a notorious animal slaughter market in Wuhan.One shows for the first time how the earliest human cases were clustered within a small radius around the Huanan Seafood Market in winter 2019.More precise analysis of swabs taken from floors, cages and counters track the virus back to stalls in the southwestern corner of the market, where animals that can harbour Covid were sold for meat or fur at the time.
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