Shaymaa Hasan Abbas, Rasha Saadi Abbas, and Lubab Tarek Nafea. “Severity and Risk of Death Due to COVID 19”. Al Mustansiriyah Journal of Pharmaceutical Sciences 20, no. 4 (April 18, 2022): 1–12. Accessed May 19, 2024. https://ajps.uomustansiriyah.edu.iq/index.php/AJPS/article/view/769.