Ignaz Philip Semmelweis (1818-1865), Hungarian obstetrician, 19th century. [Getty Images]

Ignaz Philip Semmelweis (1818-1865), Hungarian obstetrician, 19th century. (Photo by Oxford Science Archive/Print Collector/Getty Images) — see more

Ignaz Philip Semmelweis (1818-1865), Hungarian obstetrician, 19th century. (Photo by Oxford Science Archive/Print Collector/Getty Images)

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