UK study finds no evidence of nut allergens spreading through aircraft air conditioning; primary risk is nut residues on surfaces.

A UK study by Imperial College London concludes that nut allergens do not spread through aircraft air conditioning, with the primary risk being nut residues on surfaces. It suggests that passengers with nut allergies should board first to clean their areas and recommends airlines provide general-use adrenaline autoinjectors. The study also indicates that announcements banning nuts may create a false sense of security regarding airborne allergens.