Answer = None as the polio vaccine was, is and always will be a success. The polio vaccine is so successful that it resulted in the extinction of types 2 and 3 polios from the Earth.
....dont be too certain of it, since technically viruses cannot be described as being "living things" they really can't become "extinct" in the way that we usually use that term. Perhaps they've been "put to dormancy" and seemingly are nowhere to be found as of this given hour, but that doesn't necessarily mean they're all gone forever. Hopefully we won't find out anytime real soon.Answer = None as the polio vaccine was, is and always will be a success. The polio vaccine is so successful that it resulted in the extinction of types 2 and 3 polios from the Earth.
During the COVID-19 pandemic, there were no reported deaths from Polio in America because the polio vaccine is very effective and has eliminated most types of polio.Answer = None as the polio vaccine was, is and always will be a success. The polio vaccine is so successful that it resulted in the extinction of types 2 and 3 polios from the Earth. Doglikesbest