The Chinese virology institute at the centre of US allegations it may have been the source of the COVID-19 pandemic has three live strains of bat coronavirus on-site, but none match the new global contagion, its director has said.Scientists think COVID-19 -- which first emerged in the central Chinese city of Wuhan and has killed more than 340,000 people worldwide -- originated in bats and could have been transmitted to people via another mammal.B...

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