The UCLA Health (in the University of California) was breached after a cyberattack and data was stolen from approximately 4.500.000 people registered on the website. 
The university said Friday that a network containing personal and medical information had been breached by unknown hackers, who managed to steal names, addresses, social security numbers and medical records - such as status, drugs, tests and test results.
However, the university said there was "no evidence" that the data had been tampered with, although "they could not rule out the possibility."
The system healths, operates in four hospitals in Los Angeles, California and is currently working with the FBI and external IT specialist units to determine the cause of the breach, which occurred in October of last year. The breach was discovered on May 5, 2015.
It is unknown at this time what he will do after leaving the post.
UCLA Health confirmed that the data they were not encrypted, meaning that the data could be directly used by malicious users.
