Timothy Edward Alexander (Tim) Peto is a professor of medicine at the University of Oxford.
He is the co-leader for the Infection Theme of the Oxford Biomedical Research Centre, and a National Institute for Health Research Senior Investigator.Peto's research has included combination therapy for AIDS, the search for an effective AIDS vaccine, the transmission of methicillin-resistant Staphylococcus aureus in hospitals, and transmission mechanisms for Clostridium difficile infections.