He's doing better. More lucid now. His wound is at least healing fine. He's going to have a heck of a scar, but don't we all?
So, yeah, about the Plague Doctor. Don't get me wrong, the thing we're running from, the thing we're fighting against is the Slender Man. But you can't help but notice other things while running. It doesn't take a genius to realize that if the Slender Man exists, then other things could exist, too.
Of course, it helps when they all have servants and things with symbols and whatnot. This is the Plague Doctor's symbol - aptly named "the Stick and the Serpent." His servants are Oathbreakers. Like their boss, they spread corruption and disease and what the fuck they would want with Skeptic, I have no idea.
Just another mystery, I guess.