The prevalence of food allergies for every 100,000 children increased 33% from 3,566 cases in 2003-2004 to 4,848 cases in 2007-2008, according to a study presented at an American Academy of Allergy, Asthma & Immunology meeting. The prevalence of food allergies rose by an absolute rate of more than 2% in eight states, with New Hampshire having the highest overall prevalence rate at 6.7% of families reporting a child with a food allergy.

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