Shokeralla, Alshaikh A., Mohammedelameen E. Qurashi, Reem Yousif Mekki, and Mortada S. Ali. 2023. “The Effect of Symptoms on the Survival Time of Coronavirus Patients in the Sudanese Population”. International Journal of Statistics in Medical Research 12 (December):249-56. https://doi.org/10.6000/1929-6029.2023.12.29.