Lakshmanan, M.T. and Karunakaran, U. 2020. Polio vaccination coverage among children aged 12-23 months in a health block in North Kerala. International Journal Of Community Medicine And Public Health. 7, 6 (May 2020), 2291–2297. DOI:https://doi.org/10.18203/2394-6040.ijcmph20202488.