Fourment, MathieuWood, JeffreyGibbs, Adrian JGibbs, Mark2015-12-101055-7903http://hdl.handle.net/1885/59734Influenza A virus infects a wide range of hosts including birds, humans, pigs, horses, and other mammals. Because hosts differ in immune system structure and demography, it is therefore expected that host populations leave different imprints on the viralKeywords: sialidase; virus RNA; article; classification; cluster analysis; enzymology; genetic selection; genetics; genotype; Influenza virus A; Influenza virus A H1N1; Influenza virus A H5N1; molecular evolution; phylogeny; statistical model; Cluster Analysis; Evo Avian; Human; Influenza; Neuraminidase; Phylogeny; Selection; Substitution rate; Swine; Tree imbalance201010.1016/j.ympev.2010.04.0392016-02-24