Expanding horizons on a diminishing planet.
D002648:Child; D005260:Female; D014943:Global Health; D006801:Humans; D008297:Male; D010372:Pediatrics / Q000639:trends*; D011315:Preventive Medicine / Q000639:trends; D012899:Smallpox / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000627:therapeutic use; D012955:Societies, Medical; D014944:World Health Organization
D012900:Smallpox Vaccine