A computer worm that has alarmed security experts around the world has crawled into hundreds of medical devices at dozens of hospitals in the U.S. and other countries. An imaging machine used to review high-resolution images was reaching out over the Internet to get instructions presumably from the programmers who created Conficker. The manufacturer of the devices told them none of the machines were supposed to be connected to the Internet and yet they were. And because they were running an unpatched version of Microsoft s operating system used in embedded devices they were vulnerable.
Source: https://threatpost.com/conficker-worm-hits-hospital-devices-050109/72635/