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Global properties of a class of HIV models. (English) Zbl 1197.34073
Summary: We study the global properties of a class of human immunodeficiency virus (HIV) models. The basic model is a 5-dimensional nonlinear ODEs that describes the interaction of the HIV with two target cells, CD4 + T cells and macrophages. An HIV model with exposed state and a model with nonlinear incidence rate are also analyzed. Lyapunov functions are constructed to establish the global asymptotic stability of the uninfected and infected steady states. We have proven that if the basic reproduction number R 0 is less than unity, then the uninfected steady state is globally asymptotically stable. If R 0 >1 (or if the infected steady state exists), then the infected steady state is globally asymptotically stable. In a control system framework, we have shown that the HIV model incorporating the effect of Highly Active AntiRetroviral Therapy (HAART) is globally asymptotically controllable to the uninfected steady state.
MSC:
34C60Qualitative investigation and simulation of models (ODE)
92D30Epidemiology
92C60Medical epidemiology
34D05Asymptotic stability of ODE
34D20Stability of ODE
34H05ODE in connection with control problems