title: H5N1: How to track a flu virus.
authors.forename: Yi
authors.initials: Y
authors.lastname: Guan
authors.forename: Richard
authors.initials: R
authors.lastname: Webby
authors.forename: Ilaria
authors.initials: I
authors.lastname: Capua
authors.forename: Jonas
authors.initials: J
authors.lastname: Waldenström
mesh_terms: D000818:Animals; D000829:Animals, Domestic / Q000821:virology; D000835:Animals, Wild / Q000821:virology; D001208:Asia / Q000453:epidemiology; D001717:Birds / Q000821:virology*; D004196:Disease Outbreaks / Q000662:veterinary; D004372:Ducks / Q000821:virology*; D004534:Egypt / Q000453:epidemiology; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D005585:Influenza in Birds / Q000453:epidemiology / Q000635:transmission / Q000821:virology; D007251:Influenza, Human / Q000453:epidemiology / Q000635:transmission / Q000821:virology; D008877:Middle East / Q000453:epidemiology; D009976:Orthomyxoviridae Infections / Q000453:epidemiology / Q000635:transmission / Q000662:veterinary* / Q000821:virology; D011159:Population Surveillance; D013552:Swine / Q000821:virology*; D014481:United States / Q000453:epidemiology; D015047:Zoonoses / Q000453:epidemiology / Q000635:transmission / Q000821:virology