Figure 6. The Epidemiological Impact of Multiple Introductions of Disease.

(A) The morbidity-based strategy is more effective than the mortality-based strategy when T is less than 0.13 only if there is only a single introduction of disease. With four introductions of disease, however, the morbidity-based strategy becomes less effective (and is the preferred strategy only when T is less than 0.12.)

(B) At T = 0.125, the morbidity-based strategy is superior to the mortality-based strategy when there is a single introduction, but inferior when there is more than one introduction.