Figure 3.

More realistic scenarios of infection spread: included is a saturation term in the C and H channels, and the probability of becoming severely infected through channels C and H depends on the infection level, resulting in a change in the proportion of severely infected. The epidemic dynamics are shown in (a) and the fraction y₂/(y₁ + y₂) in the inset in (b). For all parameter values, see electronic supplementary material, table S4.