Adumashi, F. A. (2026) “Immunisation in the 21st Century: Foundations, Challenges, and Strategic Directions for Global Health”, Advances in Social Sciences Research Journal, 13(02), pp. 107–124. Available at: https://scholarpublishing.org/journals/index.php/ASSRJ/article/view/189 (Accessed: 3 May 2026).