Jonas Salk
Jonas Salk
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What happened with Jonas Salk on 2 July, 1952

2 July, 1952

Jonas Salk, assisted by staff at the D.T. Watson Home for Crippled Children, injected 43 children with his killed-virus polio vaccine. This marked a significant step in testing the safety and efficacy of the vaccine, moving from animal trials to human subjects. It was a crucial phase in the development of the polio vaccine.
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