Profesor Alexander Fleming, Scottish bacteriologist, c 1930.
© Science Museum / Science & Society Picture Library
Signed photograph of Fleming (1881-1955) in his studio. Fleming identified the anti-bacterial properties of the penecillium mould in 1928. The Oxford team of the Australian Howard Florey (1898-1968) and German-born British biochemist Ernst Chain (1906-1979) isolated penicillin and developed it as an antibiotic just before and during WWII.