Medicine Alexander Flemin and Howard Florey ng, Ernst Chain Fleming won worldwide acclaim and a knighthood for his 1928 discovery of the bacteria-killing effect of Penicillium notatum, but it took another 15 years of effort by many other esearchers to produce a drug that could be produced in sufficient quantities to cure human infection Chain. who had fled Hitler,'s Germany for England, snccessfully extracted the active properties of the mold Florey, an Australian and chair of pathology at Oxford, commissioned Andrew Mover and Kenneth Raper of the U.S. Department of Agriculture Lab in Peoria, Illinois, to find a way to mass produce penicillin in time to aid the war effort抗菌素的发现－治疗学的革命