WSJ What’s News Why Toxic Fumes on Planes Are Being Blamed for Illnesses and Deaths
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Dec 22, 2025 
Ben Katz, an investigative reporter at The Wall Street Journal specializing in aviation and public health, discusses alarming trends in toxic fumes leaking into airplane cabins. He reveals a surge in reported incidents and emerging links between these exposures and serious health issues, including neurodegenerative disorders. Katz addresses the industry's response, including claims of low contaminant levels, and stresses the need for independent research. For anxious travelers, he offers practical advice on protective measures, such as using gas-and-particle rated masks.
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Rising Fume Events Linked To Brain Injuries
- Reports of toxic 'fume events' where engine fluids contaminate cabin air have surged in recent years.
- Doctors see patterns linking severe fume events to neurodegenerative disorders and brain-injury–like symptoms.
Industry Acknowledges Leaks But Disputes Harm
- Industry concedes that engine and hydraulic fluids can vaporize and enter cabin air.
- Manufacturers and airlines dispute that contaminant levels are high enough to cause harm and say research is lacking.
Weigh Low Risk Against Personal Vulnerability
- Remember that fume events remain rare: roughly 22 U.S. flights a day are affected among thousands.
- Balance risk realistically and consider masks mainly if you have comorbidities or special concerns.