title: Status of immunization of one-four year olds.
mesh_terms: D002675:Child, Preschool; D004165:Diphtheria / Q000517:prevention & control; D006801:Humans; D007114:Immunization; D007223:Infant; D008457:Measles / Q000517:prevention & control; D011051:Poliomyelitis / Q000517:prevention & control; D012409:Rubella / Q000517:prevention & control; D014481:United States; D014611:Vaccination; D014917:Whooping Cough / Q000517:prevention & control