What FDA’s Newest Gene Therapy Approval Tells Us About Durability: How Long is Long Enough?
FDA Law Blog
DECEMBER 7, 2022
By Mark A. Tobolowsky & James E. Valentine — On November 22, 2022, FDA approved CSL Behring’s BLA for Hemgenix (etranacogene dezaparvovec), an AAV-based gene therapy for the treatment of adults with Hemophilia B who currently use Factor IX prophylaxis therapy, have current or historical life-threatening hemorrhage, or have repeated, serious spontaneous bleeding episodes.
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