 The study examined the disparity in vaccine coverage among different regions and districts across 99 lower, and middle income countries. The results showed that the majority of unvaccinated children are concentrated in rural areas, with some also living in urban and peri-urban areas. Additionally, the study revealed that up to 60% of unvaccinated children live within one hour of the nearest town or city, though they may not be considered part of the urban area. Furthermore, the study identified that up to 15% of unvaccinated children reside in conflict-affected areas. These findings suggest that the existing vaccination strategies and interventions should be revised to better target those unvaccinated children who are located in remote, rural, urban, and conflict-affected areas. This article was authored by Adele Wigley, Josh Lauren, Dan Hogan, and others.