title: When pigs fly: the avian origin of a 'swine flu'.
authors.affiliation: Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. wertheim@email.arizona.edu
authors.forename: Joel O
authors.initials: JO
authors.lastname: Wertheim
mesh_terms: D000818:Animals; D001717:Birds; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics*; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics*; D005585:Influenza in Birds / Q000635:transmission* / Q000821:virology; D007251:Influenza, Human / Q000635:transmission* / Q000821:virology; D009976:Orthomyxoviridae Infections / Q000635:transmission* / Q000821:virology; D013552:Swine; D013553:Swine Diseases / Q000635:transmission* / Q000821:virology