Key points from article :
Roy Palmer had multiple sclerosis (MS) and had spent 10 years using a wheelchair.
Now able to walk again after HSCT (hematopoietic stem cell transplantation).
Given chemotherapy to kill remaining immune system.
Stem cells taken from his body used to reboot the immune system.
Feeling in legs returned within 2 days.
Treatment increases risk of infections and infertility.
