title: An explanation of the interpandemic antigenic mutability of influenza viruses.
mesh_terms: D000818:Animals; D000956:Antigens, Viral; D004196:Disease Outbreaks; D004197:Disease Reservoirs; D006801:Humans; D009154:Mutation; D009975:Orthomyxoviridae / Q000276:immunology*; D011995:Recombination, Genetic; D012641:Selection, Genetic
chemical_list: D000956:Antigens, Viral