Allogeneic Bone Marrow Transplant From HLA Identical Related Donors for Patients With High Risk Hemoglobinopathies: Hemoglobin SS, Hemoglobin SC, Hemoglobin SB0/+ Thalassemia, or Homozygous B0/+ Thalassemia or Severe Variants of B0/+ Thalassemia

To do the bone marrow transplant, we must first kill the cells in the bone marrow that make the abnormal red blood cells that are found in patients with severe thalassemia or sickle cell disease.

We will do this by using three drugs: busulfan, cyclophosphamide, and CAMPATH-1H. CAMPATH-IH is an investigational drug. CAMPATH-1H is used to prevent participants from rejecting or refusing to let the donor blood cells grow in the body. After the drug treatment, participants will be given bone marrow from a brother or sister who has healthy bone marrow that matches.