On the stability analysis of a fractional order epidemic model including the general forms of nonlinear incidence and treatment function

Abstract

In this paper, we propose to study a SEIR model of fractional order with an incidence and a treatment function. The incidence and treatment functions included in the model are general nonlinear functions that satisfy some meaningful biological hypotheses. Under these hypotheses, it is shown that the disease free equilibrium point of the proposed model is locally and globally asymptotically stable when the reproduction number $R_{0} $ is smaller than 1. When $ R_{0}>1 $, it is established that the endemic equilibrium of the studied system is uniformly asymptotically stable. Finally, some numerical simulations are provided to illustrate the theory.

Keywords

• Fractional order SEIR model
• uniform asymptotic stability
• nonlinear incidence function
• treatment function

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