title: Influenza A viruses: combinations of hemagglutinin and neuraminidase subtypes isolated from animals and other sources. Brief review.
mesh_terms: D000818:Animals; D001717:Birds / Q000382:microbiology; D003201:Computers; D006389:Hemagglutinins, Viral / Q000032:analysis*; D006801:Humans; D009980:Influenza A virus / Q000145:classification* / Q000201:enzymology / Q000276:immunology; D008322:Mammals / Q000382:microbiology; D009439:Neuraminidase / Q000032:analysis*; D009626:Terminology as Topic
chemical_list: D006389:Hemagglutinins, Viral; D009439:Neuraminidase