title: Studies on a heat-labile variola virus inhibitor in normal sera. I. Detection by the variola focus reduction assay and its general characteristics.
mesh_terms: D000042:Absorption; D000818:Animals; D000998:Antiviral Agents / Q000032:analysis* / Q000494:pharmacology; D002642:Chick Embryo; D046508:Culture Techniques; D004664:Encephalitis Virus, Japanese / Q000187:drug effects; D005347:Fibroblasts; D005455:Fluorescent Antibody Technique; D006168:Guinea Pigs / Q000276:immunology; D000882:Haplorhini / Q000276:immunology; D006367:HeLa Cells; D006358:Hot Temperature; D006801:Humans; D007106:Immune Sera; D009500:Neutralization Tests; D009522:Newcastle disease virus / Q000187:drug effects; D011817:Rabbits / Q000276:immunology; D018139:Simplexvirus / Q000187:drug effects; D014616:Vaccinia virus / Q000187:drug effects; D012901:Variola virus / Q000187:drug effects* / Q000472:pathogenicity; D010948:Viral Plaque Assay; D014776:Virus Cultivation
chemical_list: D000998:Antiviral Agents; D007106:Immune Sera