title: Under surveillance.
mesh_terms: D000818:Animals; D014943:Global Health; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics / Q000302:isolation & purification / Q000472:pathogenicity; D007251:Influenza, Human / Q000453:epidemiology* / Q000635:transmission / Q000821:virology*; D011159:Population Surveillance / Q000379:methods*; D011200:Poultry / Q000821:virology; D013552:Swine / Q000821:virology; D015047:Zoonoses / Q000453:epidemiology / Q000635:transmission / Q000821:virology