[Conscience of a Conservative]

Did you know that before the polio vaccine, polio infections had been decreasing steadily on their own

Again, I direct you to Incidence Rates of Poliomyelitis in US. The polio vaccine was developed in 1953 and widespread trials begun in 1954. When was this supposed steady pre-vaccine decline?

[Secret Agent Man]

http://www.vaclib.org/sites/debate/polio.html

http://www.whale.to/vaccines/polio.html