This is interesting news from the Australian, considering past work on rebooting the human immune system to repair otherwise irreversible damage: "Dr Freedman, who specialises in treating [multiple sclerosis (MS)], wanted to study how the disease unfolds. He set up an experiment in which doctors destroyed the bone marrow and thus the immune systems of MS patients. Then stem cells known as hematopoeitic stem cells, blood-forming cells taken from the bone marrow, were transplanted back into the patients. ... We weren't looking for improvement. The actual study was to reboot the immune system. ... Once MS is diagnosed [you've] already missed the boat. We figured we would reboot the immune system and watch the disease evolve [but] have yet to get the disease to restart ... Not a single patient, and it's almost seven years, has ever had a relapse ... We are trying to find out what is happening and what could possibly be the source of repair." This is still a comparatively unsafe procedure, but with enough incentive, resources will be allocated to make it safer and better. This is good, because benefits to health and longevity are likely to result from a safe way of rebooting an age-damaged immune system.