Figure 2.
(a)–(d) show that system (7) has only one disease-free equilibrium E 0(50,0, 0) and it is locally asymptotically stable. In this case, A = 10, β = 0.05, ε = 1.2, d = 0.2, μ = 0.2, υ = 0.4, r = 2.5, α = 1.25, and k = 1.25.
(a)–(d) show that system (7) has only one disease-free equilibrium E 0(50,0, 0) and it is locally asymptotically stable. In this case, A = 10, β = 0.05, ε = 1.2, d = 0.2, μ = 0.2, υ = 0.4, r = 2.5, α = 1.25, and k = 1.25.