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flag Vertex's gene therapy Casgevy cured children 5–11 with severe sickle cell and thalassemia, with all patients free from crises or transfusions for 12+ months; one died from chemo side effects.

flag Vertex Pharmaceuticals presented new data showing that its gene therapy Casgevy effectively treated children aged 5 to 11 with severe sickle cell disease and transfusion-dependent beta thalassemia, with all eligible patients in key trials achieving freedom from crises or transfusions for at least 12 months. flag The FDA granted a National Priority Voucher for the younger group, expediting review, and Vertex plans global regulatory submissions in early 2026. flag Long-term data from older patients confirmed sustained benefits. flag One patient died due to chemotherapy complications.

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