FIG. 7.

Seroprevalence of neutralizing antibodies to HTCV-UC6 among adult blood donors. The dual-axis column chart shows the virus titers (viral genome equivalents/ml) at day 10 postinfection by a cardiovirus neutralization assay (blue lines, left axis) and the absorbances at 450 nm measured by a cardiovirus VP1 ELISA (red lines, right axis) for 57 random adult-donor serum samples and negative controls. Asterisks indicate serum samples for which there was overt CPE at day 10. The horizontal dashed line indicates the 3-log-unit cutoff threshold for virus neutralization.