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History, 01.01.2022 08:50 caldonjoshhsms2061

the salk poliomyelitis vaccine was tested on ~1 million children in 1954. in early 1955 the data came in that the vaccine was efficacious and safe

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the salk poliomyelitis vaccine was tested on ~1 million children in 1954. in early 1955 the data cam...
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