title: ANTIGENIC VARIATION AMONG NEWLY ISOLATED STRAINS OF PARAINFLUENZA TYPE 4 VIRUS.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D000940:Antigenic Variation; D003168:Complement Fixation Tests; D000882:Haplorhini; D006385:Hemagglutination Inhibition Tests; D007106:Immune Sera; D009975:Orthomyxoviridae; D029482:Parainfluenza Virus 4, Human; D018184:Paramyxoviridae Infections; D012106:Research; D014776:Virus Cultivation
chemical_list: D007106:Immune Sera
keywords: ANTIGEN-ANTIBODY REACTIONS; COMPLEMENT FIXATION TESTS; EXPERIMENTAL LAB STUDY; HEMAGGLUTINATION INHIBITION TESTS; IMMUNE SERUMS; MONKEYS; MYXOVIRUS; PARA-INFLUENZA VIRUSES; VIRUS CULTIVATION