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Alexander Fleming encounters penicillin.

1928

PHA
HISS

Alexander Fleming identifies penicillin at St. Mary's Hospital, London. This discovery will lead to the introduction of antibiotics and a huge reduction in the number of deaths from infection.

By 1941, researchers at Oxford will have determined penicillin's success rate in stopping bacterial infection. The large-scale development of penicillin will be undertaken in the U.S. during World War II.