It was approaching midnight on Sunday and the head of IT at a Florida hospital had a problem.The emergency room of Jackson Hospital, a 100-bed facility on Florida’s panhandle, called to report that it couldn’t connect to the charting system that doctors use to look up patients’ medical histories. Jamie Hussey, Jackson Hospital’s IT director, soon realized that the charting software, which was maintained by an outside vendor, was infected with ransomware and that he didn’t have much time to keep the computer virus from spreading.The hospital shut down its computer systems on his advice.

“If we hadn’t stopped it, it probably would’ve spread out through the entire hospital,” Hussey said. Hospital staff ditched the electronic records and reverted to pen and paper to keep the hospital running and organized, he said, but patient care wasn’t disrupted.

As Hussey spoke to CNN Tuesday, the hospital’s IT systems were gradually coming online, and he was expecting phone calls from the FBI (which investigates hacking incidents) and Aon, a cybersecurity consultancy that Hussey said was supporting the recovery. He was trying to figure out if the hackers had stolen any hospital data, and if they might need to be paid off to get it back. Read On: