Study Identifies Alpha-Gal Syndrome as Risk Factor for Allergic Transfusion Reactions in Type O Patients

A retrospective cohort study published in JAMA Internal Medicine suggests that alpha-gal syndrome (AGS), a tick-associated allergy, is a potential risk factor for allergic transfusion reactions in patients with type O blood, particularly in regions with high AGS prevalence. The findings indicate that avoiding group B or AB platelet and plasma products in these patients may improve transfusion safety.