Adaptation of variola virus to growth in the rabbit.
D000818:Animals; D007668:Kidney / Q000166:cytology; D011817:Rabbits; D012867:Skin / Q000473:pathology; D012899:Smallpox / Q000473:pathology; D014616:Vaccinia virus; D012901:Variola virus / Q000254:growth & development*; D014776:Virus Cultivation