Mohammad, Gorgees Shaheed. “Mathematical Modeling and Statistical Prediction of the Spread of the Covid-19 Epidemic in Iraq With Use SIR, R0”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 13, no. 1, Mar. 2021, pp. Stat Page 1 – 14, doi:10.29304/jqcm.2021.13.1.776.