Nut allergies are unlikely to be triggered by particles on aeroplanes.
Nuts might not cause allergic reactions on planes
Scientists have found that there is no evidence to support the idea that allergens can be spread through an aircraft's ventilation systems.
Boffins pointed out that allergic reactions to foods on flights are around 10 to 100 times less common onboard flights than 'on the ground' and argue that sticky residue lingering on seats and tray tables poses a greater risk to the health of passengers.
Professor Paul Turner, an expert at Imperial College London, said: "People shouldn't be worried about what food is being transmitted in the air when they fly.
"We didn't find any evidence that nut particles could travel through the cabin ventilation system on airplanes and cause reactions.
"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."