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Events on Friday 23 June 1995 1
1914 – 1995Jonas Salk (1914-1995)Died 23 June 1995, aged 80Jonas Salk was an American virologist who developed the first effective vaccine against poliomyelitis, first tested successfully in 1955. His vaccine dramatically reduced polio cases worldwide and he refused to patent it, saying it belonged to the people. He later founded the Salk Institute for Biological Studies in California.