title: WHO phasing of pandemic influenza.
mesh_terms: D000818:Animals; D001717:Birds; D004196:Disease Outbreaks / Q000145:classification; D014943:Global Health; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D053124:Influenza A Virus, H5N1 Subtype; D007252:Influenza Vaccines / Q000627:therapeutic use; D005585:Influenza in Birds / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission / Q000821:virology; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission* / Q000821:virology; D014944:World Health Organization
chemical_list: D007252:Influenza Vaccines