Motivated by the devastating infections he saw in hospitals during World War I, Fleming, a Scottish bacteriologist, began searching for an effective antiseptic. In 1922, he discovered lysozyme, an antibacterial enzyme present in saliva and tears. In 1928, he isolated the substance penicillin, which became the first successful antibiotic for human bacterial infections. His work earned him a Nobel Prize and has forever changed modern medicine. In what accidental way did he discover penicillin? Discuss