(BBC News) In 2015, a study claimed early exposure to peanut products could cut the risk of allergy by 80%.
Now researchers say "long-lasting" allergy protection can be sustained - even when the snacks are later avoided for a year.
The New England Journal of Medicine study looked at 550 children deemed prone to developing a peanut allergy.
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The latest paper builds on the results of the 2015 research, which was also carried out by King's College London and marked the first time scientists were able to suggest that exposing children to small amounts of peanut snacks could stave off an allergy.