THE immune cells that attack the brains and nerves of people with multiple sclerosis could be turned into a weapon against the disease.This month sees the beginning of a trial of a personalised vaccine for MS, designed to rein in and destroy the renegade white blood cells that attack myelin cells lining the brain and nerves of patients.To make the vaccine, PharmaFrontiers of Woodlands, Texas, takes blood from an MS patient and extracts a sample of these renegade cells. The cells are then multiplied and weakened with radiation before being re-injected into the patient, whose immune system will then recognise...