ALL DEFINITIONSMpoxDefinitionMpox is a rare disease caused by infection with the mpox virus, which is in the same family of viruses as the smallpox virus. Mpox is less contagious than small pox and produces milder symptoms.Related SpecialistsShowing 3 of 6Thomas MurrayMD, PhDMarwan Mikheal AzarMDAnnette CameronMDMore Related SpecialistsRelated Fact SheetsMpox (Formerly Monkeypox)Related NewsFamily HealthFamily HealthRelated DepartmentsShowing 3 of 33Pediatric Infectious Diseases Consultation ProgramLaboratory MedicineYale Center for Asylum MedicineMore Related Departments