Post-Transfusion Purpura

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Abstract
SHULMAN et al.1 described 2 patients in whom severe purpura developed six or seven days after transfusion; in both cases a potent platelet isoantibody was present in the plasma. The specificity of the 2 antibodies was shown to be identical with that of an antibody previously described by van Loghem and his co-workers2 that was at first called anti-Zw and later anti-Zwa (after the discovery of the allele Zwb).3 Shulman and his co-workers1 suggested that it might be better to name- the various platelet antigen systems as PlA, P1B and so forth, and that anti-Zwa should be . . .