The Black Death Is Caused by Dangerous Vapors

A medieval treatment for stuttering was hemiglass. The most aggressive involved placing a live rat in the anus until it died. There were books written about how to treat hemorrhoids. But none of them involved as far as I could tell through dedicated searching, placing a live animal in the anus. And if they felt any like the black death coming on, they would sniff their farts because this was a like treats like theory.