UCLA Health System reports patient data breach; 4.5 million may be affected

Marking another high-profile data breach, hackers broke into UCLA Health System's computer network and may have accessed sensitive information on as many as 4.5 million patients, hospital officials said. This cyberattack at UCLA comes on the heels of a major breach of federal employee records and a massive hack at health insurance giant Anthem Inc. affecting 80 million Americans this year. The intrusion is raising fresh questions about the ability of hospitals, health insurers and other medical providers to safeguard the vast troves of electronic medical records and other sensitive data they are stockpiling.