A cyberattack causing chaos for British healthcare and affecting systems in a dozen countries originated with a leaked National Security Agency hacking tool, the New York Times reports.
The ransomware, which encrypts data so users can't access it, was disseminated through email Friday, infecting computers in Britain, Japan, the Philippines, Vietnam, Turkey, Russia, and more.
Britain's healthcare system, including hospitals, doctors' offices, and ambulance companies, was majorly impacted. "We have no idea what drugs people are on or the allergies they have," one doctor tells the BBC. "We can't access the appointments system." Surgeries were disrupted and ambulances were diverted. The ransomware hit telecommunications companies and hospitals elsewhere, as well.