A vacuum of knowledge about the origins of the new coronavirus ravaging the world has provided fertile ground for all manner of theories -- from the fantastic, to the dubious to the believable.
원문출처 : https://www.cnn.com/2020/04/06/us/coronavirus-scientists-debate-origin-theories-invs/index.html
원문출처 : https://www.cnn.com/2020/04/06/us/coronavirus-scientists-debate-origin-theories-invs/index.html