The discovery of penicillin, the world's first antibiotic, in 1930, greatly reduced the threat of bacterial infection. To date, medical science has discovered more than 150 antibiotics to combat a huge range of bacterial infections.
一九三○年代，第一種抗生素盤尼西林的發明，讓細菌感染的威脅大大減低，至今醫界已研發出一百五十餘種的抗生素，可以用來對治林林總總的細菌感染。