Quote:
Originally Posted by coffeebean
Is it possible that because there was a massive effort to vaccinate our population against the polio virus, the virus didn't have much opportunity to mutate? Isn't that the idea of vaccinating the masses and attempting to achieve herd immunity? Asking those who are know more than I do.
|
Polio was a worldwide problem. Yes, the US did a great job in mass vaccination, but the rest of the world did not. There was plenty of time for it to mutate...