The case for continuing "routine" childhood smallpox vaccination in the United States.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004673:Encephalomyelitis, Acute Disseminated / Q000209:etiology; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D012899:Smallpox / Q000517:prevention & control*; D014481:United States; D014611:Vaccination / Q000009:adverse effects / Q000401:mortality / Q000592:standards*; D014615:Vaccinia / Q000209:etiology