what do u mean by allergy.
Answers
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Allergy is a disorder in which the body reacts to substances that are not generally harmful and certain symptoms are shown by the body in response to it. For example, some allergies can cause rashes of skin while some can cause redness of eye, these sensitivities are called as allergic reactions.
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An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction.
For instance, if you have an allergy to pollen, your immune system identifies pollen as an invader or allergen. The immune system responds by releasing chemicals that typically cause symptoms in the nose, throat, eyes, ears, skin or roof of the mouth.
In addition to pollen, other common allergens include dust mites, animal dander, mold, medications, insect venoms and various foods.
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