It's a whole scientific field: https://scholar.google.com/scholar?hl=no&as_sdt=7%2C39&q=odor+diagnosis&btnG= https://scholar.google.com/scholar?hl=no&as_sdt=7%

It's a whole scientific field: https://scholar.google.com/scholar?hl=no&as_sdt=7%2C39&q=odor+diagnosis&btnG= https://scholar.google.com/scholar?hl=no&as_sdt=7%2C39&q=odo... (There was a footnote in Seeing like a State about some doctor with an apprentice approaching a house and saying "smell this, this is the smell of [some infectious disease]")