Rahman Siddiqui, Md Mahmudur, et al. “How Early, Reinfection of COVID-19 Can Occurred- A Case Report”. Anwer Khan Modern Medical College Journal, vol. 12, no. 1, Mar. 2023, pp. 66-68, https://www.banglajol.info/index.php/AKMMCJ/article/view/64633.