Sir Christopher Howard Andrewes FRS (7 June 1896 – 31 December 1988) was a British virologist who discovered the human influenza A virus in 1933.

In 1927 he joined the scientific staff of the National Institute for Medical Research to assist Patrick Laidlaw in developing a vaccine against canine distemper.

This led on to research on influenza and the discovery of the causative virus in 1933 and subsequent vaccine development.

He was head of NIMR's Division of Bacteriology and Virus Research from 1939 to 1961, during which time he established the Common Cold Research Unit near Salisbury as an NIMR outpost in 1947, and the World Influenza Centre at Mill Hill in 1948, which spawned a worldwide network of collaborating centres.

[5] Andrewes married Kathleen Lamb in 1927 and had three sons, two of whom became general practitioners.