New research indicates that concerns over nut allergens spreading through aircraft ventilation systems may be unfounded, emphasising the importance of personal hygiene for allergic passengers

Air travel is a routine experience for millions, but for those with nut allergies, it can be a source of anxiety. An extensive review of current research has shed new light on this issue, challenging the common perception that nut allergens pose a significant airborne risk on flights. Conducted by a team from Imperial College London and Aviation Medical Consultancy, this pivotal study, published in the Archives of Disease in Childhood, asserts that fears surrounding airborne transmission of nut allergens are largely misplaced.

Historically, airlines have made public announcements urging passengers to refrain from consuming peanut products during flights to protect those with allergies. However, the new findings suggest these measures are unlikely to be effective. In fact, the study argues that such announcements could even foster a false sense of security among those who suffer from nut allergies.

The research analysed a variety of studies investigating whether nut particles could be transmitted through an aircraft’s ventilation system. Their conclusion was clear: no evidence supports the notion that airborne nut allergens present a significant risk. Instead, the primary concern lies with allergen residues that remain on surfaces such as tray tables and seat-back screens. Fast turnaround times employed by many low-cost airlines may exacerbate the potential for contamination, as limited cleaning time increases the chances of allergen presence.

Dr. Federica Amati, the head nutritionist at Zoe, highlighted the relative safety of flying for individuals with nut allergies. She explained that allergic reactions are significantly less common in the air than on the ground. While this could partly be attributed to increased caution among allergic passengers, the evidence suggests that the cabin environment poses less risk than previously thought.

Dr. Emily Leeming, a gut health expert, added that when individuals eliminate carbohydrates from their diets, as often suggested in discussions about food allergies, their bodies may struggle to find alternative energy sources. This imbalance can lead to fatigue and irritability. In the case of nut allergies, she encourages a sensible approach: maintain awareness of allergen residues rather than fearing airborne particles.

Given these findings, the study’s authors advocate for a proactive approach to managing nut allergies on flights. They suggest that passengers with allergies should be allowed to board the aircraft first. This priority access would enable them to clean their seating area thoroughly before the flight takes off. The experts recommend using baby wipes or antibacterial wipes to ensure a safe environment.

Professor Paul Turner, an anaphylaxis and allergy expert involved in the research, expressed optimism about potential changes in airline policy. He stated, “We’re having discussions with several major airlines and patient groups to implement consistent changes that reflect the evidence and truly enhance safety for food-allergic passengers.”

Simon Williams, the chief executive of Anaphylaxis UK, echoed this sentiment, reinforcing the importance of cleaning one’s immediate area on the plane. “A key takeaway is the necessity for passengers to clean their seat area, including tray tables and entertainment systems,” he noted.

While the study reassures passengers that the risks from airborne allergens are minimal, it does stress the importance of preparedness for those at risk of severe allergic reactions, such as anaphylaxis. The researchers recommend that individuals carry two pre-filled EpiPen devices at all times, particularly when travelling.

Overall, this study marks a significant shift in understanding the risks associated with nut allergies in the context of aviation. Addressing misconceptions and advocating for practical measures aims to make air travel a safer experience for those with food allergies.

As the travel industry continues to adapt to passenger needs, it remains essential for airlines to take these findings into account, and implement policies that reflect current evidence. The goal is clear: to create a more inclusive environment for all passengers, ensuring that those with allergies can travel with confidence, without the fear of airborne threats