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The original was posted on /r/todayilearned by /u/Overall-Register9758 on 2026-05-19 10:36:49+00:00.

Original Title: TIL about Pork-Cat syndrome, where a person who is allergic to cats has a reaction to pork. A protein in pork is so structurally similar to a protein in cat dander that the body mistakes the pork for the dander