CNN — A major US health care system said Thursday that it is diverting ambulances from “several” of its hospitals following a cyberattack this week. The cyberattack on Ascension, a St. Louis-based nonprofit network that includes 140 hospitals in 19 states, is also disrupting access to electronic health records, some phone systems and “various systems utilized to order certain tests, procedures and medications,” Ascension said in a statement distributed Thursday evening. The sprawling health care...