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Hilary Koprowski dies at 96; developed oral vaccine for polio

Hilary Koprowski, a Polish-born researcher who developed the first successful oral vaccine for polio, has died. He was 96. Koprowski died of pneumonia April 11 at his Philadelphia home, said his son, Dr. Christopher Koprowski, a radiation oncologist. In 1950, Hilary Koprowski showed that it was possible to use his live-virus oral vaccine against polio, which had plagued the United States and other countries for decades. Another researcher, Dr. Albert Sabin, would win the race to get an oral vaccine licensed in the U.S. while Jonas Salk would develop an injectable vaccine that eliminated much of the disease in the country. The two other scientists were far better known for helping...