>SARS-CoV-2 infections may have been present >in the U.S. in December 2019
If that is the case. Then how did China contain the virus in Wuhan? Then it also should have spread to the whole of China.
>SARS-CoV-2 infections may have been present >in the U.S. in December 2019
If that is the case. Then how did China contain the virus in Wuhan? Then it also should have spread to the whole of China.