1949

42,000 cases of polio reported in U.S., making it the worst year on record by far. At Lederle Labs in Pearl River, NY, Hilary Koprowski tested his live-virus polio vaccine on himself (1948) then, in 1950, on feeble-minded and epileptic children at Letchworth Village (Oshinsky, 134-135) and found that all the non-immune vaccinated kids developed Type II polio antibodies (Oshinsky, 134-136).