Experts have found no evidence to support the idea that nut allergens can spread through aircraft ventilation systems. The main risk comes from allergen residues on surfaces like tray tables and seat-back screens. Allergic reactions to food are rare during flights, possibly due to more precautions taken by passengers. Food allergy affects around 2-3% of children and 1-2% of adults in the UK and similar rates in other countries. Aircraft ventilation systems minimize the spread of contaminants, and airlines should have clear policies to provide reassurance to food-allergic passengers. It is advised that passengers at risk of food anaphylaxis carry adrenaline auto-injectors in their hand luggage.
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No evidence for belief that nut allergens spread through aircraft ventilation systems, say experts
