Smallpox vaccination: before or after one year of age?
D000367:Age Factors; D002675:Child, Preschool; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D012900:Smallpox Vaccine / Q000009:adverse effects*; D014611:Vaccination / Q000009:adverse effects*
D012900:Smallpox Vaccine