Patient Dies from Thrombotic Stroke in Pfizer's Hympavzi Hemophilia Trial After Minor Surgery on December 24, 2025 Clinical Trials Hemophilia A HYMPAVZI marstacimab patient death Pfizer Thrombotic Stroke +
As Pfizer backs out of hemophilia gene therapy space, CSL hopes Hemgenix is here to stay on April 11, 2025 alternatives Clinical Trials gene therapy Hemgenix HYMPAVZI Pfizer SMPX gene +