Venn diagrams showing the number of false positive results obtained with the RDT2, RDT1 and CATT tests.

<p>(A) Results from active and passive screening combined (N = 1,768 false positives); (B) results from active screening (N = 769 false positives); (C) results from passive screening (N = 999 false positives). For the sake of simplicity, only results obtained by the first reader are shown.