History of penicillin

Alexander Fleming was the first to suggest the Penicillium mould must secrete an antibacterial substance, and the first to concentrate the active substance which he named penicillin in 1928, and during the next twelve years he grew and distributed the original mould, but he was not the first to use its properties in medicine. Others involved in the mass production of penicillin include Ernst Chain, Howard Florey and Norman Heatley.