Question

For define allergy and give different classes of allergy

Answer 1

Explanation:

Allergy symptoms are not the same as allergies. When someone says they have allergies they often mean they have allergy symptoms: itchy, sneezy, runny or stuffy nose; itchy red or watery eyes or any combination of these. ... Sometimes there is a local ” or innate immune response as the cause of allergy symptoms.

Answer 2

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Question

For define allergy and give different classes of allergy

Answer

Allergy. ... Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.