The first mass innoculation of Salk's polio vaccine begins in Pittsburgh in 1954, the children were known as the polio pioneers. The vaccine was announced to be safe in 1955 Submitted by LoneWolfInCyberia t3_119sajw on February 23, 2023 at 8:06 AM in Pennsylvania 17 comments 111
BurghPuppies t1_j9ru8xb wrote on February 24, 2023 at 2:39 AM I guess those kids’ parents didn’t do their own research. Permalink 1
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