S. Sahak, A. N. Jabarkhil, S. Rahime, H. . Mulavizada, and K. Zafarzai, “Prevalence of the Novel COVD-19 in Nangarhar Province Corona Center Hospital during June 2020 to August 2021”, Nangarhar. Uni. Int. J. Biosc., vol. 2, no. 03, pp. 72–79, Sep. 2023.