title: Antigenic drift in influenza A/USSR/90/77(H1N1) variants selected in vitro with monoclonal antibodies.
mesh_terms: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology*; D000939:Epitopes; D014644:Genetic Variation; D053118:Influenza A Virus, H1N1 Subtype; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology*; D009500:Neutralization Tests
chemical_list: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D000939:Epitopes