Long-term Follow-up of Subjects with Sickle Cell Disease Treated with Ex Vivo Gene Therapy

Long-term Follow-up of Subjects with Sickle Cell Disease Treated with Ex Vivo Gene Therapy Using Autologous Hematopoietic Stem Cells Transduced with a Lentiviral Vector

This is a multi-center, long-term safety and efficacy follow-up study for subjects with sickle cell disease who have been treated with ex vivo gene therapy drug product in bluebird bio-sponsored clinical studies. After completing the parent clinical study (approximately 2 years), eligible subjects will be followed for an additional 13 years for a total of 15 years post-drug product infusion. No investigational drug product will be administered in the study.

Inclusion Criteria:

• Provision of written informed consent for this study by subject, or as applicable, subject's parent(s)/legal guardian(s)
• Treated with drug product for therapy of sickle cell disease in a bluebird bio-sponsored clinical study

Exclusion Criteria:

• There are no exclusion criteria for this study