Figure 3From: Dynamical crises, multistability and the influence of the duration of immunity in a seasonally-forced model of disease transmissionA stroboscopic plot of the three attractors in a S – log I phase space cross section. The duration of immunity is set at 10 years, and all other parameters are as specified in the text. Different colours indicate different attractors, with red showing the chaotic attractor, green a period 5 orbit and blue a period 3 orbit.Back to article page