Factors influencing natural immunization in diphtheria in urban and rural communities in West Bengal.
D000293:Adolescent; D002353:Carrier State / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003353:Corynebacterium diphtheriae / Q000302:isolation & purification; D004165:Diphtheria / Q000453:epidemiology / Q000276:immunology* / Q000382:microbiology; D005260:Female; D006801:Humans; D007109:Immunity; D007194:India; D007223:Infant; D008297:Male; D012424:Rural Population; D012874:Skin Diseases, Infectious / Q000382:microbiology; D012882:Skin Tests; D014505:Urban Population