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Allergies are relatively common. Both genetics and environmental factors play a role. Allergy is caused by an oversensitive immune system, which leads to a misdirected immune response.

Found at http://www.ask.com/web?q=are+allergies+hereditary%3F&search=&qsrc=0&o=0&l=dir

you should go there if you need more info

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15y ago

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