I also had the problem with those wearing perfume, or even smelly hair products. Often I would have to change my seat during the meeting when I realized I was about to pass out. It got to be somewhat embarrassing especially when someone would arrive late and happen to sit nearby and stunk. It was so obvious that I was getting up because of them, sometimes with the whole family, and moving to another spot. Even worse was when the next place I chose was just as bad.
The announcements made about this problem never got through the fumes to those that needed to hear it.
It's a good reason to stay home.