.Mpox (monkeypox).elombatd@who.int.Tue, 20/08/2024 - 09:08.Find out more about Mpox (monkeypox) Mpox (monkeypox) is an infectious illness caused by the monkeypox virus. It may cause a very painful rash, enlarged lymph nodes as well as fever. The majority of people fully recuperate, yet some get incredibly sick.