Allergies mysteriously on rise in U.S. - Allergies and asthma- msnbc.com

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Allergies mysteriously on rise in U.S. - Allergies and asthma- msnbc.com

Allergies are on the rise in developed countries, including the United States " not just seasonal allergies, but allergies of all kinds, studies show. More than half of Americans have allergies, a number that's grown between two and five times in 30 years.

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Tags: Allergies, Seasonal Allergy