Trend, morbidity profile and immunization status of diphtheria admitted cases: A 5-years review from a sentinel centre in Kolkata.

Despite strengthening of the universal immunization program, diphtheria remains endemic in India. Diphtheria is under surveillance for vaccine-preventable diseases of the World Health Organization and also in India. The present record-based retrospective study was conducted on 241 confirmed diphtheria patients admitted in an infectious disease hospital of Kolkata over 5 years (2015-2019) with the objectives of assessing the admission trend, immunization status, and outcome of patients.