Immunization update for fall 2002.
D000293:Adolescent; D002487:Centers for Disease Control and Prevention, U.S.; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007114:Immunization / Q000639:trends*; D007115:Immunization Schedule; D007223:Infant; D007231:Infant, Newborn; D007255:Information Services; D014481:United States