As far as I see there's nothing in the rules saying an injured player can't resume playing like a healthy one but I could be wrong. >_> Still trying to figure stuff out.
Before this, I'd only played Spammer Doubt, and glanced over the Walking Dead Doubt. Then there was Jingle Doubt and Lovecraftian Doubt after I had planned everything out.
Only Walking Dead Doubt (that I know of) had injuries, and it didn't seem to do anything to the players.
So my bad, I guess.