I don’t see any Polio around in the U.S. I don’t see any Small Pox season. Where’s the Whopping Cough?
My answer: The vaccines took them out.
You need to read up on your history instead of repeating what everyone else says.
In 1955, some batches of polio vaccine given to the public contained live polio virus, even though they had passed required safety testing. Over 250 cases of polio were attributed to vaccines produced by one company: Cutter Laboratories. This case, which came to be known as the Cutter Incident, resulted in many cases of paralysis. The vaccine was recalled as soon as cases of polio were detected.
You know if Polio, Smallpox, and Whooping cough were coronaviruses you might have a point. But ... they ain’t, and you don’t.
Why are some diseases amenable to complete eradication and others are not?
Bacterial vs. Viral?
Ability to rapidly mutate toward the optimum transmissibility vs. lethality?
Yep, just like the flu vaccine. </s>