title: Antigenic variants of influenza viruses: marked differences in the frequencies of variants selected with different monoclonal antibodies.
mesh_terms: D000914:Antibodies, Viral; D000918:Antibody Specificity; D000939:Epitopes; D006389:Hemagglutinins, Viral / Q000276:immunology*; D009980:Influenza A virus / Q000276:immunology*; D009975:Orthomyxoviridae / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D000939:Epitopes; D006389:Hemagglutinins, Viral