Paul Hermann Müller is awarded the Nobel Prize in Physiology or Medicine for his discovery of the insecticidal properties of DDT.

Paul Hermann Müller

20th-century Swiss chemist and Nobel laureate

Paul Hermann Müller, also known as Pauly Mueller, was a Swiss chemist who received the 1948 Nobel prize in Physiology or Medicine for his 1939 discovery of insecticidal qualities and use of DDT in the control of vector diseases such as malaria and yellow fever.