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. In this paper, we establish the global asymptotic stability of equilibria for an SIR model of infectious diseases with distributed time delays governed by a wide class of nonlinear incidence rates. We obtain the global properties of the model by proving the permanence and constructing suitable Lyapunov functionals. Under some suitable assumptions on the nonlinear term in the incidence rate, the global dynamics of the model is completely determined by the basic reproduction number R0 and the distributed delays do not influence the global dynamics of the model.

Global stability of SIR epidemic models with a wide class of nonlinear incidence rates and distributed delays