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Incidence of peanut allergy is thought to be increasing in the U.S., with a current prevalence of 1% to 2% in children. About a quarter of children outgrow their allergies, but the remainder have lifelong peanut allergies. Researchers used telephone and web-based surveys to determine the prevalence of peanut allergy in adults.
More than 40,000 adults, representative of the U.S. population, completed the survey. The self-reported peanut allergy prevalence was 2.9%; researchers thought that 1.8% had convincing peanut allergies, based on survey responses. Seventeen percent of peanut allergies in adults were reported to have been acquired in adulthood. Among the adult-onset food-allergy cases, only 59% were confirmed by physicians, and only abou…