Figure 12

Dynamic trends of the infected with different \(r_{2}\). The solid line represents the trends of the infected with the current \(r_{2}\). The orange dotted line represents the trends of the infected when \(r_{2} = 1\). The yellow dotted line represents the trends of the infected when \(r_{2} = 2\). The purple dotted line represents the trends of the infected when \(r_{2} = 2.5\). The green dotted line represents the trends of the infected when \(r_{2} = 3\)