Reactivation between variola, vaccinia and ectromelia viruses.
D000818:Animals; D004481:Ectromelia virus; D004482:Ectromelia, Infectious; D006801:Humans; D051379:Mice; D012899:Smallpox; D014615:Vaccinia; D014616:Vaccinia virus; D012901:Variola virus
ECTROMELIA VIRUS; SMALLPOX VIRUS; VACCINIA VIRUS