[Prevention of smallpox].
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine; D014611:Vaccination / Q000009:adverse effects*
D012900:Smallpox Vaccine
Profilaxia variolei.