New Research Challenges Effectiveness of In-Flight Nut Allergy Announcements

 

A recent comprehensive review has questioned the effectiveness of announcements made by airlines requesting passengers to avoid consuming nut-based foods during flights to protect individuals with nut allergies. This study, published in the Archives of Disease in Childhood, suggests that such announcements may create a false sense of security for those at risk of allergic reactions.

The research, conducted by specialists in allergy and aviation medicine from Imperial College London and Aviation Medical Consultancy, found no evidence supporting the widespread belief that nut allergens can spread through airplane ventilation systems. Instead, the primary risk arises from allergen residues on surfaces, such as tray tables and seat-back screens, which may pose a greater threat, especially on low-cost airlines that operate with quick turnaround times.

The study noted that allergic reactions to food are significantly less common during flights—about 10 to 100 times less likely than on the ground. However, the researchers speculated that this might be due to passengers with food allergies taking extra precautions while traveling.

According to the authors, individuals with nut allergies should not be concerned about airborne transmission of allergens but should be proactive in cleaning their seating areas. They recommended that airlines allow allergy-prone passengers to board first to enable them to wipe down their seats.

Their analysis was funded by the UK Civil Aviation Authority and the UK Medical Research Council. The researchers concluded, “Announcements requesting nut bans are not supported, and may install a false sense of security.” Instead, they advocated for a pre-boarding procedure for those with allergies to minimize the risk of exposure.

Professor Paul Turner, an expert in anaphylaxis and allergy, emphasized that passengers should focus on cleaning their seat areas rather than worrying about airborne allergens. “Allergenic food is really sticky and can linger on surfaces. If food-allergic individuals can board first and clean their seats, they are much less likely to experience accidental reactions,” he stated.

The study's authors also advised that individuals at risk of severe allergic reactions, known as anaphylaxis, should carry two EpiPen devices while flying. Additionally, they suggested that airlines consider providing a separate supply of adrenaline autoinjectors for general use.

Simon Williams, chief executive of Anaphylaxis UK, echoed these sentiments, highlighting the importance of passengers taking the initiative to clean their seating areas, including tray tables and entertainment systems.

The findings of this review aim to foster discussions among major airlines and patient advocacy groups to implement consistent policies that prioritize the safety and well-being of passengers with food allergies.