The primary analysis will involve comparison of Multiplo HBc/HIV/HCV and Reveal HBsAg results for each of the test markers (anti-HIV-1/2, anti-HCV, anti-HBc, and HBsAg), in each sample matrix (finger stick whole blood, venous whole blood and plasma) with the patient infected status as determined by separate algorithms for HIV, HBV, and HCV. The percent positive and percent negative agreement will be determined relative to patient infected status for each marker and sample type, with corresponding two-sided 95% confidence intervals.