Prof. D.Sc. Fathalla Rihan (Ph.D. and D.Sc.) was awarded his B.Sc. in mathematics from the Faculty of Science, Alexandria University, in 1986. He received his Ph.D. in 2000 from the School of Mathematics, The University of Manchester (U.K.), in “Numerical Treatment of Delay Differential Equations in Biosciences” and received his Doctor of Science Degree (D.Sc.) in 2018, in the field of “Features of Delay Differential Equations and Their Application.” His research interests include the following: numerical analysis; mathematical biology; mathematical modeling of real-life phenomena with memory, such as cell division, population dynamics, and infectious diseases; parameter estimation; sensitivity analysis; and qualitative and quantitative analysis of delay differential equations.