Relative to Group O, Groups A, AB and B were seen more frequently among seroreactive donors, ( P < .0001 in both bivariable and multivariable analyses; Table 1 ), to a somewhat lesser degree for Group B, but still highly significant.
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Characteristics of US Blood Donors Testing Reactive for Antibodies to SARS-CoV-2 Prior to the Availability of Authorized Vaccines.
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