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Case 2 After recovering from a previous viral infection, a 7 year old was complaining of being tired all the time. He was just not himself, and began laying down often. His mother took him to his primary care physician where they found his hemoglobin to be 6.5g/dL Upon pretransfusion work up, the antibody screen and autocontrol were positive, eventually determined to be due to an autoantibody P 1. What condition is most likely present? 2. What is the classic test used to diagnose this? 1 Explain the characteristics of autoanti-P?