Jonas Salk, American Virologist
Jonas Salk in 1955, inventor of the polio vaccine
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10799915
Media ID
47601343
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2550px x 2981px
(2.1MB)
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©Photo Researchers / Mary Evans Picture Library
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Photo Researchers
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Jonas Microbiologist Microbiology Polio Researcher Salk Vaccine Virologist Virology
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