Herman Waldmann FRS FMedSci (born 27 February 1945) is a British immunologist known for his work on therapeutic monoclonal antibodies.
Waldmann grew up in north-east London, and was a student at the Sir George Monoux Grammar School, Walthamstow and Sidney Sussex College, Cambridge.
He worked in the Department of Pathology of the University of Cambridge from 1973, becoming head of the Immunology Division in 1989.
In 1994, he took up the position of head of the Sir William Dunn School of Pathology at the University of Oxford.
He is best known for his work on therapeutic monoclonal antibodies and their use to achieve tolerance, particularly Campath-1, now licensed as Lemtrada for the treatment of Multiple Sclerosis.