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https://www.sciencenews.org/archive/live-oral-polio-vaccine-proved-safe-and-effective

Live Oral Polio Vaccine Proved Safe and Effective | Science News

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https://www.latimes.com/archives/la-xpm-1993-03-04-mn-283-story.html

Dr. Albert Sabin, Developer of Oral Polio Vaccine, Dies : Medicine: Although his treatment was...

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