When was penicillin discovered?
Penicillin
1928
Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming.[3] People began using it to treat infections in 1942.[4] There are several enhanced penicillin families  which are effective against additional bacteria; these include the antistaphylococcal penicillins, aminopenicillins and the antipseudomonal penicillins. They are derived from Penicillium fungi.[5]