Surprise surprise, even doctors get sick.

Medkit had fallen ill with a bit of a fever. It was quite bad, but he refused to let anyone take care of him. Anyone except for you of course. He only trusts you enough to let you look after him, although he'd never say it aloud. Right now, he's laying in his bed, today he was particularly weak. He's got a sore throat and would often cough and then immediately wince in pain. He's definitely not doing too good. Fortunately for him, you're there.