title: Worldwide smallpox eradication: 1977.
mesh_terms: D006801:Humans; D007391:International Cooperation; D012899:Smallpox / Q000175:diagnosis / Q000517:prevention & control*; D012900:Smallpox Vaccine; D014611:Vaccination; D014944:World Health Organization
chemical_list: D012900:Smallpox Vaccine