Scientists think they have achieved the first gene editing inside the body, altering DNA in adults to try to treat a disease, although it's too soon to know if this will help. Preliminary results suggest that two men with a rare disorder now have a corrective gene at very low levels, which may not be enough to make the therapy a success. Still, it's a scientific milestone toward one day doctoring DNA to treat many diseases caused by faulty genes. "This is a first step," said Dr.Read more on NewsOK.com