title: Isolation of a multinucleated giant cell-forming and hemagglutinin-negative variant of variola virus. Brief report.
mesh_terms: D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D002642:Chick Embryo; D002645:Chickens / Q000276:immunology; D003168:Complement Fixation Tests; D003588:Cytopathogenic Effect, Viral; D004912:Erythrocytes / Q000276:immunology; D005321:Extraembryonic Membranes; D014644:Genetic Variation; D000882:Haplorhini; D006367:HeLa Cells; D006386:Hemagglutination Tests; D006387:Hemagglutination, Viral; D006389:Hemagglutinins, Viral; D006801:Humans; D007668:Kidney; D008251:Macaca; D009500:Neutralization Tests; D011817:Rabbits; D013552:Swine; D012901:Variola virus / Q000254:growth & development / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D006389:Hemagglutinins, Viral