Figure 1. The model.

A. Schematic of the seven-compartment model with three susceptible, three infected, and one recovered compartments. Rates (divided by the state at the beginning of the arrow) are displayed. B. Simulated epidemics for k _I = [0.15,0.175,0.2 (solid line), 0.225,0.25], α = 0.001, β = 0.01. C. The ratio of cumulative escape infections to all cumulative infections for an epidemic over a range of α. β = [0.5,0.67,0.83,1], darker color indicates higher value, k _I = 0.2. The dotted line specifies the benchmark value of α = 0.001.