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On Sept. 28, 1928, Alexander Fleming discovered penicillin, one of the most important medical developments in history. The Nobel Prize-winning British scientist died in March 1955. On This Day, Sept. 28: Alexander Fleming discovers penicillin
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On Sept. 28, 1928, Alexander Fleming discovered penicillin, one of the most important medical developments in history. The Nobel Prize-winning British scientist died in March 1955. 
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