title: WHO declares that H1N1 pandemic is officially over.
authors: Zosia
authors: Z
authors: Kmietowicz
mesh_terms: D004196:Disease Outbreaks / Q000517:prevention & control; D014943:Global Health; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000401:mortality* / Q000517:prevention & control