A member asked:

Why do some people say they arent allergic to poison ivy?

A doctor has provided 1 answer
Dr. Reid Blackwelder answered

Specializes in Family Medicine

Some people aren't: Because some people are not allergic to it. Allergies depend on the response of several factors of the individual immune system. For different reasons, some people develop an allergy to something and others do not. Over time with more exposure, someone previously without a problem can develop it. Once there, it almost always remains though.

Answered 11/27/2017

5.7k views

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