Smallpox, an infectious disease unique to humans, caused by either of two virus variants, Variola major and Variola minor
Monkeypox, an exotic infectious disease caused by the monkeypox virus
Black pox, a symptom of smallpox that is caused by bleeding under the skin which makes the skin look charred or black. It was more common in teenagers [This is inconsistent with the entry on black pox]. This symptom usually indicates that a patient with smallpox is going to die
Canarypox, an Avipoxvirus and etiologic agent of canarypox, a disease of wild and captive birds that can enter humans but is unable to survive or multiply in human cells.