A sinus thing, after being trapped in a cold tower during a blizzard? Maybe Lana wasn't used to snow storms like the one they had, Robin reasoned.
"Well, I'm glad you're still in the infirmary so that hopefully you can start feeling better soon. You do need to rest up. Don't worry about your shifts, I can cover them for you."
It wasn't a problem, really, and Robin was honestly enjoying the cold.
"Oh, no problem. Hopefully the journal will help keep you distracted. I'll try to see if I find some books or something for you."