title: Viral evolution: past, present and future of influenza viruses.
authors.forename: Ursula
authors.initials: U
authors.lastname: Hofer
mesh_terms: D000818:Animals; D005814:Genes, Viral / Q000235:genetics*; D006801:Humans; D009980:Influenza A virus / Q000145:classification* / Q000235:genetics*; D005585:Influenza in Birds / Q000821:virology*; D010802:Phylogeny