My buddy's gf is allergic to peas.

She visited a friend's house and started getting an itchy throat immediately. Friends knew of her allergy and obviously hadn't prepared any.

Turned out the dog food had peas in it and the bag was open on the other end of the house in the kitchen. (And a supporting role from whatever the dog had slobbered on in the living room)

Sometimes it blows me away how sensitive our bodies can be.