You went to medical school, right?
You don't need to worry about a thing, doctor. Sure, you want to help sick people, but you certainly don't want to be getting sick yourself, right? Are you sick of "modern" medicine that has completely ruined your business? Then you need this Plague Doctor kit.. You are a doctor, aren't you? Are you someone who uses somewhat dubious methods to treat plague-infected people? The black death is making its way across the continent and you need to keep healthy.