We had an email at work some years ago saying deodorant and perfume can set of some peoples' asthma so to be careful about wearing it.
I asked my manager if that meant we couldn't wear deodorant anymore because believe me it's bad enough when some of our library users, the great unwashed, don't wear it.
She said no it doesn't mean that, as if I was being difficult. Still no idea what we were meant to do about it!