Sir Alexander Fleming, a Scottish bacteriologist discovered 'Penicillin' on 15th September 1928 while studying the influenza virus in the Laboratory of the Inoculation Department at the St. Mary's Hospital of London in the United Kingdom.
This year marks the 92nd anniversary of the discovery of penicillin, the first antibiotic drug to occur naturally and used therapeutically.
It was an accidental discovery, which started when Fleming, often referred to as a careless lab technician, returned back from a vacation of two weeks to find that, a mold had developed on an accidentally contaminated staphylococcus culture plate. On examining the mold, he noticed that the culture prevented the growth of the staphylococci.
Fleming received the Nobel Prize in Physiology Or Medicine in 1945 for his discovery of penicillin. Since it's discovery, penicillin has changed the course of medicine and it is the most widely used antibiotic around the globe, to date.