Figure 4From: Rich dynamics of a delayed SIRS epidemic model with two-age structure and logistic growth(a): The asymptotical stability of \(E_{\ast}\) in Case (III). (b): The stable distributions of \(i(t,a)\) and \(r(t,a)\) in Case (III). (c): The case of Hopf bifurcation in Case (III). (d): The periodic distributions of \(i(t,a)\) and \(r(t,a)\) under Case (III)Back to article page