Preventing peanut allergies.  What does the recent data mean?

Peanut allergy is a worldwide concern, but especially in Western countries, in which prevalence has doubled in the last ten years, to a rate of 1.4 to 3.0 percent of children.  To prevent the development of peanut allergy, national guidelines have attempted to keep pace with this crisis, with recommendations, at first, of delayed exposure to peanut and, more recently, of earlier exposure.  But a universally accepted and research-supported approach …

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