Opinions vary. Dr. Amesh Adalja is an infectious disease specialist, who thinks it's more likely that this isn't the case, and that it was just the impression g

Opinions vary. Dr. Amesh Adalja is an infectious disease specialist, who thinks it's more likely that this isn't the case, and that it was just the impression given by false-negatives from the tests. (That is, if you test someone 3 times over 3 weeks, and see Infected, Uninfected, Infected, it could either be a false negative, or a reinfection.) I'm afraid I don't have a written source, I heard it in this interview podcast: https://samharris.org/podcasts/191-early-thoughts-pandemic/ https://samharris.org/podcasts/191-early-thoughts-pandemic/