Wain, Zafeer Naeem, Rizwan Ali Masood, Rai Waqas Ali, and Irfan Bashir. “An Overview of Immunization Practices in Pakistan”. International Current Pharmaceutical Journal 5, no. 11 (October 9, 2016): 94–96. Accessed May 8, 2024. https://www.banglajol.info/index.php/ICPJ/article/view/29901.