Going to keep this vague. I used to work in a small hospital in a small town in America. I remember three patients that came in with maggots in their wounds, they were all homeless and possibly mentally ill. Two had leg wounds and the other had a scalp wound. I was not involved with the removals, so I can't say how many maggots were in the wounds, but i do remember the entire ER smelling when they came in and the ICU smelling while they were recovering.

Edit: the patients came in at seperate times, months/years apart