FDA approves gene therapy for hemophilia B, now world's costliest medicine

The Food and Drug Administration has approved a gene therapy treatment for adults with hemophilia B that costs $3.5 million per dose, making it the world's most expensive medicine.

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Peter Marks ,Behring Hemgenix ,Brad Loncar ,Kim Phelan ,Bloomberg ,Drug Administration ,Coalition For Hemophilia ,Biologics Evaluation ,