Allergists across the city reported a doubling and tripling of patients, exceeding previous records.

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In the meantime, allergists say many patients with severe peanut allergies may elect to try Xolair when it becomes available.

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Allergists are excited about Xolair because it is one of the first drugs to prevent the allergic reactions that can lead to life-threatening asthma attacks.

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The only way to stop a life-threatening reaction, called anaphylaxis, is an epinephrine auto-injector, which allergists recommend that everyone with severe food allergies should carry.

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In 2008, Greensboro had higher-than-average pollen counts, its residents were taking more allergy medications, and the city didn't have enough allergists for its population, according to the report.

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These so-called allergy capitals are ranked based on pollen levels, use of allergy medications and the number of board-certified allergists in the areas, according to a foundation statement.

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But two allergists at the University of Virginia have gathered data showing that the food allergy Olive has, known as galactose-alpha-1, 3-galactose, or alpha-gal for short, is affecting more than 1, 500 Americans.

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