Peter Karel, Baron Piot, KCMG, FRCP, FMedSci (born 1949) is a Belgian microbiologist known for his research into Ebola and AIDS.
After helping discover the Ebola virus in 1976 and leading efforts to contain the first-ever recorded Ebola epidemic that same year, Piot became a pioneering researcher into AIDS.
He has held key positions in the United Nations and World Health Organization involving AIDS research and management.
He has also served as a professor at several universities worldwide.