Until recently, most doctors believed that peanut allergies, which affect some 1.5 million Americans and can be deadly, were a lifelong affliction. Now it turns out that some people outgrow them. As part of an ongoing study of peanut intolerance, Johns Hopkins researchers gave 80 allergic children a "peanut challenge"--that is, they made them eat peanuts. More than half the kids passed the test, suffering none of the common allergy symptoms, such as hives, vomiting or swelling of the face and lips. The study, published in this month's Journal of Allergy and Clinical Immunology, looked at children with low levels (5...
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