About penicillin in world war 1

The discovery of penicillin is due to the Scottish biochemist Alexander Fleming. During the First World War, Fleming served as a military doctor and could not accept the fact that soldiers wounded after a successful operation still died - from the onset of gangrene or sepsis. After the war ended, Fleming returned to the UK and set out to improve the quality of Lister's antiseptic dressings soaked in carbolic acid. Soon he discovered a natural antiseptic in nasal mucus and called it lysozyme. But it turned out that lysozyme, like carbolic acid, does not penetrate deep enough into the wound, so internal suppuration continued. A few years later, in 1928, having accidentally discovered mold in a Petri dish, studying staphylococcal bacteria (which cause, for example, boils and tonsillitis), Fleming discovered penicillin.