Graphical presentation of the results comparing each assay by new infection status.

<p>The results are plotted on the log scale for each assay; the dashed lines represent the standard cutoffs for seropositivity for the assays. (A, B, C) Blue points represent enrollment serology results for those subjects who did not have an incident HPV16 infection, and red squares represent enrollment serology results for subjects for whom we detected an incident HPV16 infection. New infection was detected over four years of follow-up.