Fifth Percentile Cutoff Values for Antipneumococcal Polysaccharide and Anti-Salmonella typhi Vi IgG Describe a Normal Polysaccharide Response

Abstract

We establish reference cutoff values for interpretation of PPV response measured by bead-based assay, cutoff values for <i>S. typhi</i> Vi vaccine responses, and normal values for AHA. For the first time, the intraindividual consistency of all three methods is studied in a large cohort.