RAPID MICROBE EVOLUTION. “In a decade bacteria can produce 200,000 generations — about the number of generations of humans there have been since our lineage split from that of chimpanzees. So it’s hardly surprising that in less than a human lifespan we’ve seen the evolution of new diseases such as HIV and numerous antibiotic-resistant bacteria.”
https://www.newscientist.com/article/dn13640-evolution-myths-evolution-produces-perfectly-adapted-creatures/