By Michelle Roberts
A multiple sclerosis treatment being tested in patients can stop the disease for at least five years, say doctors.
The risky therapy involves wiping out the person’s immune system with strong cancer drugs and then rebooting it with a stem cell transplant.
Doctors say only some patients will be suitable to try it, particularly because it is so high risk.
Out of 281 people who had the treatment, nearly half benefited, but eight died shortly afterwards.
The work in JAMA Neurology is one of the largest and longest investigations of this aggressive MS treatment.
Mark Rye, 41 and from Surrey, had his transplant just before Christmas 2016. Two months on he is doing well.