Just don't mention the whole being dead thing if nobody asks.

[ Everything else about him is the same, mostly, so covering up symptoms might be all he needs for now, in case a friend or teacher or somebody asks about it. ]

It's personal knowledge, mostly. I like keeping my hands in my pocket for a reason, you know.

[ Keeps them toasty warm, when his own body's doing a sucky job at circulating blood. ]