Figure 8

Effects of the transmission parameters on viral levels. The plots gives natural log of the viral levels against time. a gives the plots for viral levels when β₁ and β₂ are varied simultaneously, b gives the plots for viral levels when β₂ is varied and c gives the plots for viral levels when β₁ is varied. The viral level increases with increases in β₁ and β₂, however, increasing β₂ had a greater impact on viral levels when compared to increases β₁. The viral levels are more sensitive to β₂ than β₁.