Reactivation of heat-inactivated Variola virus by active vaccinia virus.
D000818:Animals; D002642:Chick Embryo; D046508:Culture Techniques; D005321:Extraembryonic Membranes; D012900:Smallpox Vaccine; D013696:Temperature; D014616:Vaccinia virus; D014776:Virus Cultivation
D012900:Smallpox Vaccine