Backup and Restore the Immune System
Researchers are already destroying and recreating the immune system to remove existing damage; the next logical step from there is reported by the New Scientist: "Imagine having a spare copy of your immune system on ice, ready to replace your existing one should you fall victim to AIDS, an autoimmune disease, or have to undergo extensive chemotherapy for cancer." Or indeed, perhaps, should you do no more than get old. "An Anglo-American company called Lifeforce has received permission from the US Food and Drug Administration to do just that. The firm collects 480-millilitre samples of blood from healthy individuals, extracts the white blood cells and stores them as an insurance policy against future disease. The service comes at a price, though: around $800 for taking the initial sample then $25 per month for storing the cells ... That sample would have the complete repertoire of all your white blood cells ... By taking some of the stored cells and exposing them to natural growth factors such as interleukin-2, whole new armies of white blood cells could be grown in the lab and reinfused into the patient. ... we can send them their 'pristine' system from 25 years ago." The normal cautions apply, but this seems to be a promising idea.
Link: http://www.newscientist.com/article/mg19426094.400-create-a-backup-copy-of-your-immune-system.html