A vaccination dilemma.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007115:Immunization Schedule; D007883:Legislation, Medical; D012409:Rubella / Q000517:prevention & control*; D012411:Rubella Vaccine / Q000008:administration & dosage; D014481:United States; D014611:Vaccination
D012411:Rubella Vaccine