Sir Alexander Fleming

He was appointed regional pathologist at Harefield Hospital during the Second World War in 1939 and devoted most of his time at Harefield's pathology department to studying the effects of his discovery on a wide variety of infections, including tuberculosis.

During his time at Harefield Hospital, Fleming contributed much to the study and development of penicillin which, becoming readily available in 1945, revolutionised the face of modern medicine.