title: Comparative studies on the properties of variola virus strains. I. Characteristics of chorioallantoic membrane lesions and pathogenicity for chick embryos after different methods of inoculation.
mesh_terms: D000346:Afghanistan; D000818:Animals; D002462:Cell Membrane / Q000032:analysis; D002642:Chick Embryo; D005321:Extraembryonic Membranes / Q000473:pathology*; D006801:Humans; D007194:India; D007267:Injections; D007630:Kenya; D008099:Liver / Q000382:microbiology; D008722:Methods; D009031:Moscow; D009390:Nepal; D012899:Smallpox / Q000401:mortality / Q000473:pathology*; D012901:Variola virus / Q000145:classification / Q000302:isolation & purification / Q000472:pathogenicity*; D014776:Virus Cultivation; D014779:Virus Replication