Question

what is allergy ???????? ​

Answer 1

Definition of Allergy

allergy is an exaggerated reaction of immune system of a person to certain foreign substances that do not bother most other people.

types of allergies

there are two types of allergy

1. seasonal allergy
2. perennial allergy

Answer 2

Answer:

The definition of allergy

Allergy occurs when a person's reacts to substances in the environment that are harmless to most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medications.