Career

Margaret Jennings joined the University of Oxford"s Sir William Dunn School of Pathology under Howard Florey in 1936. By 1938, she was part of the team led by Florey investigating the production and applications of penicillin. Jennings undertook animal work as well as research on bacteriology.

As part of testing, Jennings assayed the toxicity of penicillin extracts against white cells of the blood.