UnitedHealth says hackers possibly stole large number of Americans’ data By Reuters

By Manas Mishra and Zeba Siddiqui(Reuters) -UnitedHealth Group said on Monday that hackers stole health and personal data of potentially a “substantial proportion” of Americans from its systems in February, as the largest U.S. health insurer scrambles to contain the damage. The intrusion at its Change Healthcare (NASDAQ:) unit, which processes about 50% of U.S. medical claims, was one of the…