Model in this section involves the immune response CD8+ T-cells and the effectand treatment on HIV transmission. The model is subdivided into five subclasses whichare the concentration of healty CD4+ T-cells (x), the concentration of infected CD4+T-cells (y), the concentration of free virus HIV (v), the concentration of CD8+ T-cells(z) and the concentration of activated CD8+ T-cells (za). The schematic diagram of thismodel is shown in Figure 3.1 below.