What is blocking early peanut introduction?

Peanut allergy affects up to 2% to 4% of US children,1,2 and prevalence appears to be increasing.3 Most (approximately 75–80%) retain peanut allergy and risk for anaphylaxis into adulthood.4 Recognizing the burden of peanut allergy, professional societies advised dietary interventions in infants and young children to lower risk of developing peanut allergy. Based on a changing body of evidence during the past 2 decades, guidelines have shifted from delayed introduction of allergenic foods to early and sustained ingestion of peanut.

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