“…A number of different approaches (mathematical modeling, analysis, simulation) have been used for modeling the disease transmission, and a large number of mathematical models have been published [10,12,20,21,24]. Such models provide challenges and ideas in many other fields of applied mathematics such as ecology, economics in which nonlinear mathematical models having a similar structure are considered [2][3][4][5]22,23,25]. The mathematical models allow to obtain an estimate for the behavior of epidemics and to predict the asymptotic behavior of infection in order to take suitable actions to control epidemics.…”