My daughter was on the Magic February 2002 and twisted her ankle.. she hobbled down to the infimary to find it was closed, so she hobbled up to guest services, they told her to go back to her room and they'd have a wheel chair brought up for her (why they couldn't do it right then I don't know) so she hobbled back to her room and they came and got her.
By the time she got back to the infirmary, tons of people were there (mostly seasick) and she had to wait, even though she technically was first... one thing she learned though~put the brake on the wheel chair!! she was rolling back and forth, but couldn't put her foot down to stop!! $175 later, they wheeled her back to her room with an aircast and pain killers. She said they were very nice doctors and nurses (assistants) etc. and looked like they were equipped for just about any type of an emergency.