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Why do people get allergies?

People are said to have allergies when their bodies have a negative reaction to a foreign substance.


According to the Mayo Clinic, antibodies protect us from unwanted bacteria that could cause infection. When a person has allergies, their antibodies are reacting to a substance that it thinks is harmful, even when it isn’t.


Some common allergens are foods (like peanuts, shellfish, and dairy products), medications and insect stings.


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