I think it's pretty clear from the scientific data that the covid-19 virus is a recent zoonotic infection that jumped from bats to humans (with possibly another animal in between). How could it possibly have caused any human illness before that?
BTW, covid-19 is the disease (same as the flu). The virus is named SARS-Cov-2.
BTW, covid-19 is the disease (same as the flu). The virus is named SARS-Cov-2.