I actually don't know what level of Thalassemia he has. I don't think the doctor ever said. He wouldn't have even been tested for it if my brother hadn't requested it because he was suffering from pallor, fatigue, shortness of breath, etc. Scoliosis also runs in my family and when the deformity on my nephew's chest became obvious, the doctor said it was caused by his Scoliosis. When I read about the bone deformities associated with Thalassemia, I thought perhaps it might be caused by the Thalassemia. As a matter of fact, now that I am thinking about it, the only people in my family that have Scoliosis also have Thalassemia, with the exception of my youngest son. He tested negative for Thalassemia but he suffers from all the symptoms (i.e, pallor, shortness of breath, fatigue, etc.)