Thanin SitthiwiratthamAnwar ZebSaowaluck ChasreechaiZohreh EskandariMouhcine TiliouaSalih Djilali2025-03-102025-03-102021Results in Physics2211379710.1016/j.rinp.2021.1046682-s2.0-85112861442https://repository.dusit.ac.th//handle/123456789/4715To describe the main propagation of the COVID-19 and has to find the control for the rapid spread of this viral disease in real life, in current manuscript a discrete form of the SEIR model is discussed. The main aim of this is to describe the viral disease in simplest way and the basic properties that are related with the nature of curves for susceptible and infected individuals are discussed here. The elementary numerical examples are given by using the real data of India and Algeria. © 2021 The Author(s)All Open Access; Gold Open Access; Green Open AccessBifurcationDifference equationsDiscrete modelsInfected curveMathematical COVID-19 modelNumerical solutionArticleScopus