Polio Cases from the Late 30s to 1955

Fewer Cases in Late 30s

Dec 1, 1930

In the late thirties, there were fewer cases of polio than in 1956.

Rise of Cases

Jan 1, 1944

There was a rise in the early 1940s, particularly in 1944 when 19,029 cases were reported.

Drop to 10,000 Polio Cases

Jan 1, 1947

A sharp drop to about 10,000 cases in 1947.

"High Polio Years"

Jan 1, 1952

In 1952, there were a number of "high polio years" reaching a peak with 57,879 cases.

Drop-off of Half the Cases Cases in 1952

Jan 1, 1955

Drop-off to about half that number of cases in 1952 in 1955.