Impact of COVID-19 Pandemic on Routine Immunization Among Tribal Children in Odisha: A Rapid Epidemiological Survey.

Objective: To assess the impact of COVID-19 on immunization coverage and delayed vaccination among tribal children in the Khordha district of Odisha state.

Methods: A cross-sectional rapid epidemiological survey was conducted using a standard WHO (30 × 7) cluster survey with 30 tribal villages under the Community Health Centre (CHC), Mendhasala, Odisha, as clusters and seven children from each cluster. A total of 14 children from each cluster; seven each born in 2019 (2019 cohort) and 2020 (2020 cohort), amounting to 420 children were included. The dates of vaccination and related details were obtained from the mother and child protection cards alongside a pretested, semi-structured questionnaires administered to the mothers or primary caregivers. Immunization coverage and delayed vaccination rates were compared between the two cohorts.

Results: Full immunization coverage was 81.9% and 77.6% in the 2019 and 2020 cohorts, respectively. A significant decline in full immunization coverage was seen for 14 weeks (Pentavalent-3) vaccine in 2020 cohort (P = 0.01). The proportion of delayed vaccination for scheduled vaccines at birth, 6 weeks, 10 weeks, 14 weeks, and 9-12 months for 2019 cohort and 2020 cohort were 8.6%, 6.7%, 18.1%, 19.5%, 22.4%, and 21.9%, 26.7%, 30.5%, 19%, 16.2%, respectively. However, delayed vaccination rates among the 2019 and 2020 cohorts were not statistically significant.

Conclusion: Our study findings showed a little decline in immunization coverage in tribal areas during the pandemic.