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Allergies are an abnormal response of the immune system. People who have allergies have an immune system that reacts to a usually harmless substance in the environment. This substance (pollen, mold, animal dander, etc.) is called an allergen.
Allergies are a very common problem, affecting at least 2 out of every 10 Americans.
It is the responsibility of each person on earth to help the environment by recycling whenever possible. You are abide to fulfill your duty whether you live in New York City or in rural South Dakota.
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