Even the biolab one could be both natural and man made: the virus was found and isolated by biologists studying local bat populations. They then failed to contain it properly (remember how surprised everyone was when they realized how contagious it was over the air?) and it started spreading.
Even the biolab one could be both natural and man made: the virus was found and isolated by biologists studying local bat populations. They then failed to contain it properly (remember how surprised everyone was when they realized how contagious it was over the air?) and it started spreading.