Diphtheria immunization.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000517:prevention & control*; D004168:Diphtheria Toxoid; D006801:Humans; D007115:Immunization Schedule; D014611:Vaccination
D004168:Diphtheria Toxoid