title: [Message from the General Director of the World Health Organization].
mesh_terms: D006801:Humans; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000627:therapeutic use*; D014944:World Health Organization
chemical_list: D012900:Smallpox Vaccine
vernacular_title: Botschaft des Generaldirektors der Weltgesundheitsorganisation