Fig. 6.

Contrasting the epidemic through different strategies. We plot $K\left(t\right)∕N$ (upper plot) and $I\left(t\right)∕N$ (lower plot) for the same system and initial conditions as in Fig. 1. Now we consider $\alpha ={\alpha }_0$, $\beta ={\beta }_0$, $\eta ={\eta }_0$ (solid curve, black); $\alpha ={\alpha }_0∕2$, $\beta ={\beta }_0$, $\eta ={\eta }_0$ (dashed curve); $\alpha ={\alpha }_0$, $\beta =2{\beta }_0$, $\eta =2{\eta }_0$ (dotted curve); and $\alpha ={\alpha }_0∕2$, $\beta =2{\beta }_0$, $\eta =2{\eta }_0$ (solid curve, blue). Actions reducing $\gamma$ by the same factor through action on the different parameters produce the same epidemic peak level, but with a substantially different dynamics. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)