European Commission Approves Pfizer's DURVEQTIX, A One-Time Gene Therapy For Adults With Hemophilia B

• A one-time dose of DURVEQTIX has reduced bleeds post-treatment compared to standard of care with a median annualized bleed rate (ABR) of zero bleeds (range 0 to 9.9) after up to four years of follow-up, providing sustained bleed protection and potentially avoiding years of treatment burden with prophylaxis for many patients.

Pfizer Inc. (NYSE:PFE) today announced that the European Commission (EC) has granted conditional marketing authorization for DURVEQTIX® (fidanacogene elaparvovec), a gene therapy for the treatment of severe and moderately severe hemophilia B (congenital factor IX deficiency) in adult patients without a history of factor IX inhibitors and without detectable antibodies to variant AAV serotype Rh74. DURVEQTIX is designed to enable people living with hemophilia B to produce factor IX (FIX) themselves via a one-time dose, rather than multiple intravenous FIX infusions weekly or biweekly with the current standard of care.1,2,3