title: Studies on the standardization of smallpox vaccine. 3. An assay with a rabbit preliminarily immunized by passive immunization.
mesh_terms: D000818:Animals; D001681:Biological Assay; D007106:Immune Sera; D007112:Immunity, Maternally-Acquired; D007118:Immunoassay; D008722:Methods; D011817:Rabbits; D012900:Smallpox Vaccine / Q000592:standards*; D014616:Vaccinia virus / Q000276:immunology
chemical_list: D007106:Immune Sera; D012900:Smallpox Vaccine