Figure 2.

Time plots for the virus dynamics of model (1) for different φ or for different δ_E. (a) φ = 0.8 or 1.1 day⁻¹, δ_E = 0.7 day⁻¹. (b) δ_E = 0.2 or 0.6 day⁻¹, φ = 1.1 day⁻¹. The values of other parameters are the same as those in Figure 1. The initial values for T, $T_E^{*}$, T* and V are 10⁶ ml⁻¹ [40], 0, 0, and 10⁻⁶ ml⁻¹ [55], respectively. The steady state of the viral load is plotted as a function of φ or δ_E in (c) and (d). When φ < 0.23, the virus population dies out.