Diphtheria: a continuing hazard.
D000293:Adolescent; D000328:Adult; D002170:Canada; D002648:Child; D004165:Diphtheria / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D004168:Diphtheria Toxoid; D005260:Female; D006801:Humans; D007115:Immunization Schedule; D008297:Male; D014481:United States
D004168:Diphtheria Toxoid