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Aviation crew radiation exposure and cancer mortality

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2026-08-18 22:26 UTC → 2026-08-20 07:04 UTC · added ~~removed~~

A study published in JAMA Internal Medicine has identified pilots and flight attendants as having significantly higher proportions of radiation-related cancer deaths compared to other occupations. Researchers from Harvard Medical School analyzed nearly 13 million death certificates from the US National Vital Statistics System between 2020 and 2024, finding that radiation-related cancer deaths accounted for 6.9% of deaths among flight attendants and 6.7% among pilots. The increased risk is attributed to exposure to galactic cosmic radiation at high altitudes. Aircrew members receive an average annual ionizing radiation dose of approximately 3 to 6 millisieverts, which is significantly higher than the 0.4 millisieverts received by a passenger on ten intercontinental flights. Findings indicate that flight attendants have approximately 50% higher odds of dying from radiation-linked cancers—including leukemia, lymphoma, melanoma, and certain skin, breast, prostate, thyroid, or central nervous system cancers—relative to the general working population, while pilots have approximately 36% higher odds. Experts noted that these groups did not show higher-than-normal death rates for cancers not tied to radiation, suggesting cosmic radiation exposure is a likely factor rather than lifestyle variables. The study further noted that the risk for aircrews even exceeds that of nuclear technologists who work directly with radioactive materials. The findings suggest a critical need for occupational radiation protections commensurate with actual exposure levels. However, some analysts caution that the study measures the share of deaths caused by specific cancers among those who have already died, rather than the overall incidence or mortality rate of cancer within the aviation profession. They also noted that rigorous medical screenings for pilots may influence mortality patterns.

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