Leading scientists tell CNN that it's possible the virus didn't just come from bats in the past months, but that it could made the leap to humans many months, perhaps even years ago before it then transferred among people to become as lethal as it has. CNN's Nick Paton Walsh reports.


원문출처 : https://www.cnn.com/videos/health/2020/04/04/uk-coronavirus-evolution-walsh-pkg-vpx.cnn