Question

What is an allergen? Give three examples

Answer 1

1. An allergen is a substance due to which allergic reaction occurs.
2. In some people, the immune system recognizes allergens as foreign or dangerous agents.
3. As a result, the immune system produces IgE antibodies to protect the body from the allergen This response causes allergy symptoms.
4. Allergens include pollen, food, mould, and other substances.