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A member asked:
What are the types of allergic reactions? do they always result in hives?
A doctor has provided 1 answer
No: There are many types of allergy and not all result in hives. The more talked-about type involves IgE-antibody and these reactions commonly involve hives (but be careful, hives do not equal allergy). IgE is a form of "memory" for the immune system. Another form is T-cell (a white blood cell) that is involved in "delayed" allergy (eg poison ivy, some sulfa reactions) usually with diffuse rash...
Answered 3/10/2015
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