Schick test survey in Punjab.
D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000517:prevention & control; D004167:Diphtheria Toxin; D005260:Female; D006801:Humans; D007194:India; D007223:Infant; D008297:Male; D012882:Skin Tests
D004167:Diphtheria Toxin