Hepatitis B, Diphtheria, tetanus, acellular pertussis, polio, tuberculosis, influenza, STDs, Measles, mumps, rubella, Human papillomavirus, Meningococcal virus, the common cold and dozens of others would have been eradicated on their own. 36 million wouldn't have died from HIV infections.
In other words over these many centuries we would have been virus free by now. So the next time some idiot politician, social media pandemic expert wanna be, celebrity host or so-called medical expert claim variations of Covid virus infections will lead to herd humanity weigh that that against all scientific evidence that indicates it's impossible.

