Alexander Fleming was a scientist born on a farm in Scotland in 1881.
After returning from a holiday in 1928, Fleming discovered that some Staphylococcus bacteria he was previously studying had been killed by some mould that had begun to grow in his petri dish.
Fleming discovered that the Penicilliin mould he found growing in his lab was able to kill many different types of bacteria such as streptococcus and meningococcus.
Fleming and his assistants then needed to find a way to extract pure Penicillin from his mould juice, in order for it to be tested on humans and animals.
Until Howard Florey and Ernst chain began testing Pennecliin's effectiveness in animals, the drug was just a curiosity. Howard and Ernst conducted a series of tests on animals, seeing if the mould could kill strong bacterias. Florey and Ernst began to grow mould in mass amounts, in interesting places such as bathtubs and food tins.