The person with the allergy has done nothing wrong. The woman wearing excessive perfume, should be the only one terminated if it comes to that. She is the only one that has control over what is being done.
In a sane world, I would tell the person wearing too much perfume to knock it off, you’re smogging everybody out, and everybody would breathe better as a result. But in P.C. bizarro world, I have to balance the desire of one individual’s desire to bathe in perfume against one’s allergy to such odors. The P.C. zero tolerance solution is to get rid of both problems. I would rather like to see an agreeable solution between both parties, especially if both are valuable to the company. I don’t mean to rattle anyone’s cages, but this seems to be the current paradigm:
Eliminate any source of contention, regardless of the cost.