I was just on TvTropes and wandered into the
Headbutt Thermometer (which sounds adorable as fug btw) and found this:
In the Girls und Panzer, in the " Motto Love Love Sakusen Desu" comic, while Miho is sick with a cold, Hana does this to her to take her temperature.
So in one of the mangas Miho does get sick and is probably adorable. And points for Hana checking her for a fever with her forehead. Oh my god, that's freaking cute.