Figure 6.

Total attack rate against aggregate cost. Each point in the scatter plot corresponds to an intervention policy and diagnostic method. Points of the same shape refer to the same diagnosis method but with different intervention strategies. The plot area can be divided into four quadrants, with the lower-left depicting the most optimal outcome. Data points can be grouped into clusters, shown by dashed circles. The points in each cluster are derived from one of the stated intervention policies (filled circle, D1; open circle, D2; inverted triangle, D3; open triangle, D4).