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How a Pennsylvania doctor stopped a virus outbreak in 1934 — with blood

J. Roswell Gallagher administered “serum” to students at the Hill School in Pottstown. In China, the same technique was recently used against the coronavirus.

Pictured in this 1934 yearbook, J. Roswell Gallagher, then the school physician at the Hill School in Pottstown, stopped an outbreak of measles by treating students with serum that he extracted from one of their schoolmates who had been infected.
Pictured in this 1934 yearbook, J. Roswell Gallagher, then the school physician at the Hill School in Pottstown, stopped an outbreak of measles by treating students with serum that he extracted from one of their schoolmates who had been infected.Read moreCourtesy The Hill School