Nonsmokers can be at risk of lung cancer — know the hidden causes

Nonsmokers can develop lung cancer, with about 10% of annual cases occurring in individuals who have never smoked. Radon, a radioactive gas, is the second-leading cause of lung cancer, and other risk factors include secondhand smoke and family history. Testing and professional mitigation can address radon exposure, while CT screening may help detect early-stage lung cancer in high-risk individuals.