Question

Describe how an allergic reaction occur in human being

Answer 1

Answer:

An allergic reaction occurs when the immune system overreacts to a harmless substance known as an allergen. The immune system protects the body from infections, viruses and diseases.

Explanation:

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Answer 2

Allergy:-

When a person shows hyper-response or-hypersensitivity to a common antigen or agent them it is called an allergy. The agents that cause

allergies are called allergens. Common allergens are pollen grains, food items like fish or egg. cold, heat, fibers, sunlight, medicines (penicillin), etc.

Allergic reaction:-

An allergic reaction occurs when the immune system overreacts to a harmless substance known as an allergen. The immune system protects the body from infections, viruses and diseases.

Type of allergies:-

You can be allergic to a wide variety of substances – including

• pollen,
• animal dander,
• mold and
• dust mites.