Analysis of a Dengue Disease Model with Nonlinear Incidence

Figure 3

Phase plot of 𝐼 verses 𝑆 showing stability of unique feasible disease free equilibrium point when 𝑅₀<𝑅^∗₀<1 for the parameter values 𝑏₁=80,  𝜆₁=0.00001,  𝛼=0.04,  𝜇₁=0.06,  𝛾=0.015,  𝜆₂=0.0002,  𝑏₂=200,  𝜇₂=0.5.