title: On the origin of the human influenza virus subtypes H2N2 and H3N2.
mesh_terms: D001483:Base Sequence; D005814:Genes, Viral; D006389:Hemagglutinins, Viral; D053121:Influenza A Virus, H2N2 Subtype; D053122:Influenza A Virus, H3N2 Subtype; D009980:Influenza A virus / Q000235:genetics*; D009439:Neuraminidase / Q000096:biosynthesis; D012367:RNA, Viral / Q000032:analysis / Q000235:genetics*; D011995:Recombination, Genetic; D014764:Viral Proteins / Q000096:biosynthesis
chemical_list: D006389:Hemagglutinins, Viral; D012367:RNA, Viral; D014764:Viral Proteins; D009439:Neuraminidase