Beijing (AFP) - 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.But the director of the Wuhan Institute of Virology told state broadcaster CGTN that claims made by US President Donald Trump and other...