My 24 year old son developed severe liver dysfunction mere weeks after booster shot. He now also has ITP and platelet levels are 8 - white blood cell count is 1. He has had 4 platelet transfusions but counts drop the next day. They won't do bone marrow biopsy because his platelets are too low. Steroids have decreased high liver enzyme levels and his Bilirubin which was 13 is now 2.8. Any success with medications that boost platelets available?