Penicillin, discovered by Alexander Fleming in 1928, is c________ to be one of the most important medicines in contemporary s_____. Howard Florey and Ernst Chain managed to use new chemical t________ to purify it to be a medicine. Due to its widespread use, many lives were saved during World War II. Penicillin is also used to treat other illnesses i______ pneumonia. In 1945, Fleming, Florey and Chain s_____ the Nobel Prize in Medicine for their work.

Penicillin

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