371792.fig.001
Figure 1: 𝐼 versus 𝑆 , where 𝑏 = 2 0 , 𝛽 = 0 . 0 1 , 𝛾 = 0 . 4 , 𝜇 = 0 . 2 , 𝜎 = 5 , and 𝑅 0 0 . 8 3 satisfy stable condition for the virus-free equilibrium 𝐸 0 (50.00, 0).