The end of routine smallpox vaccination in the United States.
D000328:Adult; D006801:Humans; D007223:Infant; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000008:administration & dosage; D014481:United States; D014611:Vaccination / Q000009:adverse effects; D014944:World Health Organization
D012900:Smallpox Vaccine