What is Pencilin?

PENCILLIN: - first antibiotic to be produced on a mass scale(1940's), its derived from Penicillium fungi. Many more discovered in 1950s and 1960s - new discoveries have slowed down recently as many scientists felt it was unnecessary, also they're costly and very slow to develop - Some scientists fear that we are fighting a losing battle as it may ultimately lead to people dying from simple infections (eg, following operations)