FIG 2.

True positive rate (PPA) compared with false-positive rate (1 - specificity). True positive rate (positive percent agreement [PPA], sensitivity) and false-positive rate (1 - negative percent agreement [NPA], specificity) were determined for all the evaluations or EUA authorized evaluations, respectively, for combined (A and D), IgG (B and E), and IgM (C and F) performance. The dashed lines on each graph represent the performance thresholds for the true positive rate (90% for combined and IgG, and 70% for IgM) and false-positive rate (7% for combined, IgG, and IgM).