“Comparative Analysis of Measles Morbidity and Mortality in Calabar during the Expanded Programme on Immunization and the National Programme on Immunization Eras”, Niger J Paediatr, vol. 30, no. 3, pp. 81–85, Jul. 2024, Accessed: Dec. 20, 2024. [Online]. Available: https://www.njpaediatrics.com/index.php/njp/article/view/668