Fig. 4.

Impact of interventions. Interventions are implemented through three scenario sets: (A and E) sequentially between GIH and secondary locations, (B and F) only in GIH locations, (C and G) simultaneously among all locations, and (D and H) sequentially between GIH and secondary, but initialized independently in secondary, locations. For each scenario set, mild, moderate, and intensive intervention reduces community transmission and international travel by 20%, 50%, and 80%, respectively. Intervention durations of 2 wk to 12 wk are considered, in increments of 2 wk. Effectiveness is evaluated in terms of the proportion of clinical cases averted and number of locations where the goal of effectively reducing incidence to <10 cases per day could be achieved in advance as compared with projections in the absence of interventions.