September 15, 1928 Alexander Fleming discovers penicillin On this day in 1928, Scottish bacteriologist Alexander Fleming discovered the antibiotic penicillin. Fleming’s discovery revolutionized medicine and has saved countless people from fatal infections.
Alexander Fleming Aug 1881-Mar 1945, born in Scoland, is the discoverer of penicillin in 1928. It was finally tested, purified and in use in 1939. Penicillin changed the course of medicine. Fleming was knighted in 1944 and given the Nobel Prize in 1945.