X-linked Chronic Granulomatous Disease (X-CGD) is a rare immune disorder that prevents white blood cells from killing foreign invaders. This results in severe, recurrent infections that can impact quality and length of a patient’s life. X-CGD is usually diagnosed before age 5, but without treatment, children die before age 10. A team at UCLA is using the patient’s own genetically modified blood stem cells to create a new blood supply and a healthy immune system, with the aim of curing patients with this disease.