The improvement of immunization status in children attending child health clinics.
D002662:Child Health Services; D004165:Diphtheria / Q000517:prevention & control; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D008296:Malaysia; D010352:Patient Dropouts; D011314:Preventive Health Services; D012900:Smallpox Vaccine
D012900:Smallpox Vaccine