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A member asked:
How long after exposure/ingestion of a substance (eg nuts/seafood ect.) does anaphylactic shock occur, if someone is allergic? minutes? hours?
A doctor has provided 1 answer
Allergy types: There are different types of allergic reactions. By definition, anaphylaxis occurs very rapidly after exposure to an allergen - usually within minutes and usually severe and possibly life-threatening. Then there are other types of hypersensitivity reactions that can occur over hours, days or even weeks from exposure time!
Answered 7/13/2013
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