found one :
Polio Wasn’t Vanquished, It Was Redefined
What is conveniently omitted from this heroic story is that the reason the number of polio cases in the U.S. dropped so precipitously following the mass introduction of the Salk vaccine in 1955 was not medical, but rather administrative. Yes it’s true, in 1952 there were 52,879 reported cases of polio in the U.S. And yes, in 1955 the number went down to 28,985, and by 1959 it had dropped to 8,425.3 But first of all, it’s important to note that the numbers were already declining significantly prior to the initial use of the Salk vaccine. In 1953, there were 35,592 cases of polio in the U.S.3 So there were other things going on in the U.S. at the time totally unrelated to the Salk vaccine.
.
https://thevaccinereaction.org/2015/07/polio-wasnt-vanquished-it-was-redefined/
.