Tom has a virus called C. difficile:
The nurse came in and told me about it, handed me some information to read, and wiped all the surfaces in the room with Clorox. Tom can't have any visitors except me. I have to wear gloves, in addition to my regular medical booties and gown. I'm not allowed to leave the room unless I dispose of all my hospital wear and put on brand new ones outside the door.
Tom is asleep and doesn't yet know.