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Optimal HIV treatment by maximising immune response. (English) Zbl 1057.92035
Summary: We present an optimal control model of drug treatment of the human immunodeficiency virus (HIV). Our model is based upon ordinary differential equations that describe the interaction between HIV and the specific immune response as measured by levels of natural killer cells. We establish stability results for the model. We approach the treatment problem by posing it as an optimal control problem in which we maximise the benefit based on levels of healthy $$CD4+$$ $$T$$ cells and immune response cells, less the systemic cost of chemotherapy. We completely characterise the optimal control and compute a numerical solution of the optimality system via analytic continuation.

MSC:
 92C50 Medical applications (general) 49N90 Applications of optimal control and differential games 49K15 Optimality conditions for problems involving ordinary differential equations 49J15 Existence theories for optimal control problems involving ordinary differential equations
COLNEW; XPPAUT
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