title: Molecular mechanisms of variation in influenza viruses.
mesh_terms: D000956:Antigens, Viral / Q000235:genetics; D000939:Epitopes; D006389:Hemagglutinins, Viral / Q000235:genetics / Q000276:immunology; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology* / Q000472:pathogenicity; D009154:Mutation; D009439:Neuraminidase / Q000235:genetics; D011487:Protein Conformation; D012367:RNA, Viral / Q000276:immunology; D014764:Viral Proteins / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D000939:Epitopes; D006389:Hemagglutinins, Viral; D012367:RNA, Viral; D014764:Viral Proteins; D009439:Neuraminidase