This documerntary was produced in 2004 by CBS as part of "Witness", a documentary from CBS news. Origin of AIDS: The Polio Vaccine (CBC 'Witness', 2004) On April 12, 1955 Jonas Salk's polio vaccine was first licensed for public use in the U.S. In the years afterwards 90 million Americans were vac...
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2014-01-28 19:05:40
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