title: ANTIGENIC VARIANTS OF INFLUENZA A2 VIRUS.
mesh_terms: D000941:Antigens; D003168:Complement Fixation Tests; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human; D009975:Orthomyxoviridae
chemical_list: D000941:Antigens
keywords: ANTIGENS; COMPLEMENT FIXATION TESTS; HEMAGGLUTINATION INHIBITION TESTS; INFLUENZA VIRUSES