Up to 4.5 million people may have had their medical information stolen in a recent cyberattack on the UCLA Health System.
Here is what you need to know:
Who is at risk?
Hackers obtained access to the parts of the UCLA Health network that contain personal and medical information for its healthcare system. However, there is no indication that any information was stolen, the hospital system said, but it couldn't rule that out.
UCLA said they are working with the FBI and have hired private experts to help secure information on its servers.