Today, 65 years ago in 1955, Jonas Salk’s polio vaccine was declared safe and he chose not to patent it(Picture)


Today, 65 years ago in 1955, Jonas Salk’s polio vaccine was declared safe and he chose not to patent it(Picture) Today, 65 years ago in 1955, Jonas Salk’s polio vaccine was declared safe and he chose not to patent it(Picture) Reviewed by STATION GOSSIP on 01:30 Rating: 5

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