Aviva Blog Directory » Health & Well-Being » Conditions & Diseases » Lymphatic System & Immunity » Allergies

Allergies, are hypersensitivity disorders of the immune system and are activated when an immune system reacts to normal substances, called allergens. The allergens activate mast cells, which are a type of white blood cells, via an antibody named immunoglobulin E. The resultant reaction is an inflammatory response which can be merely uncomfortable, or it can be fatal.

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