Although not original, this is a well-designed follow-up study of a relatively large number of patients from a single institution who showed the presence of red cell alloantibodies, a significant proportion of which disappeared over time. The relevance of non- persistence of red cell antibodies for eventual delayed hemolytic transfusion reactions is pointed out by the author. The conclusions are sound and the recommendations apposite, with a good review of the literature.

– Marcela Contreras