title: Mechanism of antigenic drift in influenza virus. Amino acid sequence changes in an antigenically active region of Hong Kong (H3N2) influenza virus hemagglutinin.
mesh_terms: D000595:Amino Acid Sequence; D000906:Antibodies; D000911:Antibodies, Monoclonal; D000956:Antigens, Viral / Q000032:analysis*; D001666:Binding Sites, Antibody; D000939:Epitopes; D006389:Hemagglutinins, Viral / Q000032:analysis*; D009975:Orthomyxoviridae / Q000276:immunology*
chemical_list: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D000939:Epitopes; D006389:Hemagglutinins, Viral