Exposure in transit: roads, rail, metro, buses, aircraft, ships and private vehicles.
Long flights roughly double clot risk from a small baseline, and the risk peaks two weeks after landing. Compression stockings have high-certainty Cochrane evidence behind them, with one caveat worth reading.
Observation surveys found no unrestrained infants on the road — yet a quarter of infant crash deaths were unrestrained. Car seats cut fatal injury risk 71% for babies. The stages, and the five installation mistakes that keep showing up.
US traffic deaths fell to 36,640 in 2025, the second-lowest rate on record. But among rear-seat occupants killed in crashes only 32% were belted, against 84% everyday use — and an unbelted passenger behind you is a danger to you.
