title: Avian influenza--the facts from the WHO.
mesh_terms: D000818:Animals; D001717:Birds; D006801:Humans; D015994:Incidence; D009980:Influenza A virus / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000453:epidemiology* / Q000517:prevention & control; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D011200:Poultry; D018570:Risk Assessment; D015996:Survival Rate; D014944:World Health Organization