Fig. 11.2.

Simulated effects of interventions during the first wave of the 2010 cholera epidemic in Haiti. The stochastic model described in Chao et al (2011) was run 50 times per scenario, and the points plot the median attack rates for the stochastic simulations and the lines represent the range of the minimum and maximum attack rates. Several intervention scenarios were modeled: no intervention (in red), vaccination well before the epidemic (pre-vaccination, in blue), vaccination after the first cholera cases were confirmed (mass vaccination, in green), vaccination targeted to communities near rivers after the first cholera cases were confirmed (high-exposure vaccination, in yellow), and prioritizing vaccination and educational campaigns to improve hygiene and sanitation to communities near rivers after the first cholera cases were confirmed (in purple). Note that pre-vaccination delays the epidemic peak, while reactive strategies tend to reduce but not delay the peak.