Figure 7

Scatter plots with a quadratic fit between the viral levels and the infected cell killing efficiency of CTLs. The red line represent the quadratic fit and the small circles represent the data points (model outcomes). There is a negative relationship which can be best be explained by a quadratic function between the viral levels and the killing efficiency of infected cells by CTLs. The parameter values used are given in Table 1 and the initial conditions were $D_0=100,P_0=100,Q_0=100,V_0=100,T_0=750,T_0^{\ast }=100,C_0=1,B_0=1$.