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. 2008 Feb;98(2):213–215. doi: 10.2105/AJPH.2006.106138

FIGURE 1—

FIGURE 1—

Probable and confirmed cases of (a) influenza A and (b) influenza B reported to Tri-County Health Department, by week of first report, through the active model or through Colorado’s Electronic Disease Reporting System: Greenwood Village, Colo.