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BackgroundBrazil requires the performance of both a test for hepatitis B surface antigen (HBsAg) and a test for antibodies to the core of hepatitis B for blood donor screening. Blood centres in regions of high HBV endemicity struggle to maintain adequate stocks in face of the high discard rates due to anti‐HBc reactivity. We evaluated the potential infectivity of donations positive for anti‐HBc in...