According to the Asthma and Allergy Foundation of America, an estimated 50 million Americans -- 1 in 5 overall -- suffer from one or more allergies. These cases run the gamut from seasonal allergies to food and drug, latex, insect, skin and eye allergies. Moreover, research suggests that the prevalence of allergies in the United States has been on the rise since the early 1980s across all age, sex and racial groups.

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