Scientists are trying a revolutionary new approach to treat rheumatoid arthritis, multiple sclerosis, lupus and other devastating autoimmune diseases – by reprogramming patients’ out-of-whack immune systems. When your body’s immune cells attack you instead of protecting you, today’s treatments tamp down the friendly fire but they don’t fix what’s causing it. Patients face a lifetime of pricey pills, shots or infusions with some serious side effects — and too often the drugs aren’t enough to keep their disease in check. 'We’re entering a new era,' said Dr. Maximilian Konig, a rheumatologist at Johns Hopkins University who’s studying some of the possible new treatments. They offer 'the chance to control the disease in a way we’ve never seen before.' Researchers are altering dysfunctional immune systems, not just suppressing them, in a variety of ways that aim to be more potent and more precise than current therapies.