"Woah! Woah, one thing at a time!" Goodness, he is not used to having such an adoring fan all of a sudden. "I can start with the plague, if you've never actually heard of it before..."

Yeah, that was the safest place to start. He never really mentions this to anyone, but he actually has zero medical training whatsoever. The position of a plague doctor was pretty much open to anyone who was brave enough to come close to the infected and attempt a cure, and... Well, not that he needed to worry about that. His particular situation gave him an advantage...

But would you look at that, there's a couch under the books. Let him set his bag to one side and sit for a bit.

"... You have heard of the Black Death, right?"