More than 35 percent of U.S. adults and 17 percent of children and teens now have a disease, after the American Medical Association formally voted Tuesday to classify “obesity as a disease requiring a range of medical interventions.” The shift is aimed in part to get doctors to tackle obesity as if they were treating a disease instead of a lifestyle condition in need of modification. “Recognizing obesity as a disease will help change the way the medical community tackles this complex issue that affects approximately one in three Americans,” Dr. Patrice Harris of the AMA said in a statement....