Permanence of an SIR epidemic model with density dependent birth rate and distributed time delay

Permanence of an SIR epidemic model with density dependent birth rate and distributed time delay

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Article ID: iaor20118940
Volume: 218
Issue: 5
Start Page Number: 1682
End Page Number: 1693
Publication Date: Nov 2011
Journal: Applied Mathematics and Computation
Authors: , ,
Keywords: population, epidemiological models
Abstract:

In this paper, we investigate the permanence of an SIR epidemic model with a density‐dependent birth rate and a distributed time delay. We first consider the attractivity of the disease‐free equilibrium and then show that for any time delay, the delayed SIR epidemic model is permanent if and only if an endemic equilibrium exists. Numerical examples are given to illustrate the theoretical analysis. The results obtained are also compared with those from the analog system with a discrete time delay.

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