Key points from article :
People with sickle cell disease make abnormal versions of haemoglobin – distorting red blood cells into a sickle-shape that can get stuck in blood vessels.
Bone marrow stem cells removed, treated, and replaced in boy’s body.
Medication and symptom free two years later.
Team has treated seven other patients, who are showing “promising” progress.
Treatment could work for everyone with the disorder.
The study was published in the New England Journal of Medicine.
