title: Antigenic shift in myxoviruses.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000235:genetics*; D004197:Disease Reservoirs; D004372:Ducks; D000939:Epitopes; D014644:Genetic Variation; D006389:Hemagglutinins, Viral / Q000235:genetics; D006801:Humans; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology*; D009154:Mutation; D009439:Neuraminidase / Q000235:genetics; D011995:Recombination, Genetic; D013552:Swine; D014481:United States
chemical_list: D000956:Antigens, Viral; D000939:Epitopes; D006389:Hemagglutinins, Viral; D009439:Neuraminidase