Medicine: Biographies
- Paul Ehrlich
- Paul of Aegina
- Percivall Pott
- Peter Brian Medawar
- Philippus Aureolus Paracelsus
- Pierre Bretonneau
- Pierre Charles Alexandre Louis
- Pierre Flourens
- Pierre Paul Emile Roux
- Rene Jules Dubos
- Rhazes
- Richard Bright
- Rita R. Colwell
- Robert Barany
- Robert C. Gallo
- Robert Koch
- Ronald Ross
- Rosalyn Sussman Yalow
- Rudolf Carl Virchow
- Rudolf Virchow