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Story summary
- Canadian researchers found children's food allergy risk changes markedly during the first five years.
- The study analyzed blood from 500 mother-child pairs at ages one and five, testing 300 allergen components.
- Sensitivity rose from 25% at age one to 40% at age five, with egg and peanut early, tree nuts later.
- About one-quarter of children lost sensitization to peanut, tree-nut or sesame allergens as they aged.