Mulavizada , H., A. N. Jabarkhil, S. Rahime, K. Zafarzai, and S. Sahak. “Prevalence of the COVD-19 in Nangarhar Corona Center According to Season in 2020- 2022”. NUIJB, vol. 3, no. 02, Feb. 2024, pp. 18-21, https://nuijb.nu.edu.af/index.php/nuijb/article/view/150.