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I've heard that the longer a virus is in a population the less deadly it becomes. Something about deadliness being selected out from generation to generation.
Had me thinking that with the speed of vaccine development for Covid-19 that the virus may no longer have time to settle into that more benign phase.
Is there any truth to this?
Unfortunately, there's no rule about viruses getting weaker. In fact the original SARS-CoV-2 was less deadly than some of the newer variants. In any case, SARS-CoV-2 has pretty much run rampant around the world even with the development of vaccines.
