A kid that once would’ve gone into anaphylaxis upon eating a peanut may, with the gradual introduction of the allergen to their diet, be able to enjoy a peanut butter and jam sandwich.
This “amazing phenomenon” known as oral immunotherapy — in which a patient is given small amounts of an allergy-causing food over a period of time to build tolerance — has been around for decades, said pediatric allergy expert Douglas Mack.
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