I'll ride his bike for him to stop it getting lonely while he's crook
Are you sure he's got pneumonia? You know what us blokes are like. Me, I cough just once and I've got raging flu.
Seriously though, my daughter had pneumonia a couple of years back and it can be nasty so tell him to take it easy and get well soon. But your in the nursing trade aren't you? so I'm sure he's in good hands.