Iftikhar, A., M. F. Sabar, Q. ul A. Ahmad, R. Farooq, and M. Akhtar. “Different Covid-19 Vaccines in Pakistan: Administration and Effectiveness”. National Journal of Health Sciences, vol. 8, no. 3, Sept. 2023, pp. 132-6, https://ojs.njhsciences.com/index.php/njhs/article/view/455.