Commonest age group for diptheria is -: (A) 1-2 Years, (B) 1-5 Years, (C) 2-7 Years, (D) 2-9 Years
Answer is B. Diphtheria paicularly affects children aged 1 to 5 yrs. In countries where widespread immunization practised, a shift in age incidence has been observed from preschool to school age. Ref:PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :160