Dynamics of a delay differential equation model of hepatitis B virus infection. (English) Zbl 1140.92014

Summary: We formulate and systematically study the global dynamics of a simple model of hepatitis B virus in terms of delay differential equations. This model has two important and novel features compared to the well-known basic virus model in the literature. Specifically, it makes use of the more realistic standard incidence function and explicitly incorporates a time delay in virus production. As a result, the infection reproduction number is no longer dependent on the patient liver size (number of initial healthy liver cells). For this model, the existence and the component values of the endemic steady state are explicitly dependent on the time delay. In certain biologically interesting limiting scenarios, a globally attractive endemic equilibrium can exist regardless of the time delay length.


92C60 Medical epidemiology
34K20 Stability theory of functional-differential equations
37N25 Dynamical systems in biology
92C50 Medical applications (general)
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