by Ellis Paxson Oberholtzer
Preventive Services Task Force "does not recommend lung cancer screening for people who have never smoked." You can lower your risk of getting lung cancer by avoiding exposure to secondhand smoke, diesel exhaust, asbestos, arsenic, and some forms of silica and chromium.
That makes them well worth trying in my books virtually any day in November, or December and January in the deep South and Texas
Andrews JC, Netemeyer RG, Burton S, Kees J
Although both the level and duration of exposure are directly associated with increased CV risk, there is no safe threshold below which there is no effect, and concentrations of fine and especially ultrafine particles in ambient air are thought to be strongly underestimated by actual standards and measurements [50]