Ali Qeran, Mohammed, and Yahia Ahmed Raja’a. “Assessment of the Performance of Healthcare Providers in the Expanded Programme of Immunization Before and After an Educational Intervention, Sa’adah, Yemen, 2025”. Sana’a University Journal of Medicine and Health Sciences 19, no. 4 (August 31, 2025): 266–281. Accessed January 19, 2026. https://journals.su.edu.ye/index.php/jchm/article/view/2084.