Allergen
Alternate Names : Allergy-Causing, Irritant
Definition An allergen is a substance that can cause an allergic reaction. Allergens are substances that, in some people, the immune system recognizes as "foreign" or "dangerous" but cause no response for most people.
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Common allergens include:
- chemicals and plants
- drugs (such as antibiotics, serums)
- foods (such as milk, chocolate, strawberries, wheat)
- infectious bacteria, viruses, and animal parasites
- inhalants (such as dust, pollen, perfumes, smoke)
- physical agents (such as heat, light, friction, radiation)
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