Abstract
Acquired hemophilia A (AHA) is a rare bleeding disorder caused by functional insufficiency of coagulation factor VIII (FVIII). Autoantibodies targeting FVIII may neutralize its procoagulant effect, thereby causing severe bleeding. Such inhibitory autoantibodies have been detected in autoimmune diseases, pregnancy, infections, or malignant diseases. Older age and certain drugs are known co‐risk factors.1 To our knowledge, only two reported cases document AHA diagnosed 8 and 20 days after influenza vaccination.
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