Fig. 1.

$R_0$ for SARS is plotted with respect to the coefficient of variation of the recovery time distribution for various values of the CoV of the death time distribution (lines). For reference, the Weibull distribution is also plotted for different values of the CoV (see insets). Parameters values: $m^{-1}=36\mathrm{days}$, $v^{-1}=23.5\mathrm{days}$, $w=\frac{1}{5}-m-v{\mathrm{day}}^{-1}$ and $k=10{\mathrm{day}}^{-1}$. The value of b is chosen so that $R_0=3$ (dot). See Donnelly et al. (2003) and Lipsitch et al. (2003) for details.