The FDA has approved a CRISPR-based medicine called Casgevy for the treatment of sickle cell disease, a genetic disorder that affects approximately 100,000 people in the US. The treatment, developed by Vertex Pharmaceuticals and CRISPR Therapeutics, has been shown to eliminate recurrent episodes of debilitating pain caused by sickle cell disease. Casgevy is a potential cure for the disease, but its high cost, estimated at $2.2 million, may limit access to the treatment. The approval marks a significant milestone in the development of genetic medicines for inherited diseases.