A recent study conducted by researchers at Imperial College London has found that the risk of nut allergies from air on planes has been overblown. The study focused on peanuts, reviewing the results of five different studies to explore the evidence behind the inhalation risk.
The researchers found that aircraft filters on commercial flights effectively stop nut particles from circulating around the cabin, making the risk of a serious allergic reaction from inhaling allergens very low. In fact, one study found no peanut particles in air samples collected during a commercial flight where peanuts were being served as a snack.
While some airlines have stopped serving peanuts on board over allergy fears, there is no strong evidence to suggest that people with peanut allergies are at risk of a severe reaction from others eating peanuts on a plane. The same is expected to be true for other types of nuts and foods that people are commonly allergic to.
However, the researchers did find higher levels of allergens on seats, trays, and the floor of the aircraft. They recommend wiping down these surfaces to reduce the risk for passengers with allergies. The findings of this study may also apply to other allergens, such as seafood, eggs, and other nuts.
Overall, the study concludes that the risk of nut allergies from air on planes has been overblown. The researchers are working with UK airlines to make flying safer for people with allergies. This report summarises well-established findings that peanut is highly unlikely to aerosolise and pose an airborne risk to passengers, according to Matthew Greenhawt at the University of Colorado.