 The big six countries in the Husea are facing challenges in measles elimination due to inadequacies and inequalities in MCV1 coverage, with geographic and socio-economic factors contributing to these disparities. Inequalities were evident in all countries except Thailand, and equity-oriented changes in policies need to be implemented to increase MCV1 coverage and reduce childhood mortality among disadvantaged populations. This article was offered by Yajing GAO, Ashish K.C., Junie Chen, and others.