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Objectives
To report a case of hyperhaemolysis syndrome (HHS) that occurred during perinatal blood transfusion in a pregnant Chinese woman with β‐thalassemia to deepen the understanding of HHS and the risk of transfusion therapy for patients with thalassemia.
Background
Most HHS cases occur in people with sickle cell disease. So far, no cases of HHS have been reported in the Chinese population...