Never smoked? You could still be at risk of developing lung cancer, doctors warn

Lung cancer, the second-most common cancer in the U.S., is often associated with smoking — but even those who have never had a cigarette could be at risk of the deadly disease.

While it’s true that those who smoke face a much higher risk, up to 20% of lung cancers affect people who have never smoked or have smoked fewer than 100 cigarettes in their lifetime, according to the U.S. Centers for Disease Control and Prevention (CDC).

Despite this, the US Preventive Services Task Force (USPSTF)...