title: World Health Organization declares A (H1N1) influenza pandemic.
authors.forename: John
authors.initials: J
authors.lastname: Zarocostas
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology*; D014944:World Health Organization