Seasonal variability is not observed in the rates of high anti‐A and anti‐B titers in plasma, apheresis platelet, and whole blood units tested by different methods

Abstract

The prevalence of high-titer plasma, AP, and WB units varies by titer method and local definition of high titer. Even at the lowest titer threshold of 50, a significant proportion of units had a high-titer antibody, although the clinical relevance of this finding needs further investigation.