Figure 8.

Dynamic trends of the infected with different removal rates (γ). The solid line represents the trends of the infected with the current γ. The purple dotted line represents the trends of the infected when $\gamma =0.12$. The orange dotted line represents the trends of the infected when $\gamma =0.06$. The blue dotted line represents the trends of the infected when $\gamma =0.04$. The green dotted line represents the trends of the infected when $\gamma =0.02$