There are people who cannot stand perfume, so much so that just hearing the word "perfume" makes them react strongly against it.
ご質問ありがとうございます。
"There are people who cannot stand perfume,"=「香水を耐えられない人々がいる」
"so much so that just hearing the word 'perfume' makes them react strongly against it."=「『香水』という単語を聞くだけで、拒否反応を示すほどに。」
ご参考になると幸いです。