Question

Which of them is right definition of allergy?
a, The protective immune system of a person becomes overactive to something in the environment that usually causes no problem in most people but triggers some symptoms and diseases.
b, It is an exaggerated reaction of immune system of a person to certain foreign substance that do not bother most other people.
answer it​

Answer 1

Answer:

I think its (b.)...........

Answer 2

The protective immune system of a person becomes overactive to something in the environment that usually causes no problem in most people but triggers some symptoms and diseases.