"We didn't find any evidence that nut particles could travel through the cabin ventilation system on airplanes and cause reactions," he said. "On top of that, the vast majority of people with food allergies don't react to the smell of food, even if they are allergic to very small amounts."
Air circulates across the cabin, not through it, and efficient filtering systems remove the vast majority of dust, vapours and food particles from the air passengers breathe, the review says.
Nut bans on flights may give passengers with allergies a false sense of security, the authors say in the BMJ journal Archives of Disease in Childhood.
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