Fleming grew up on a sheep farm in Ayrshire and when he was 13, moved to London.
Fleming studied medicine and the started work a St Marys
After two hot weeks away, Fleming returned to his lab and found a bacteria cuture that had been left open had mould growing on it.
The mould has created a bacteria free circle!
It was two other scientists however, that developed the mold (now called penicillin) into a drug form that could be administered
Pharmaceutical companies started to mass produce penicillin, getting around Fleming's main issue of mass production.
he Nobel Prize in Physiology or Medicine 1945 was awarded jointly to Sir Alexander Fleming, Ernst Boris Chain and Sir Howard Walter Florey "for the discovery of penicillin and its curative effect in various infectious diseases