What to know about lung cancer
Medical Xpress
March 5, 2026
It can be surprising to learn that lung cancer can develop in people who have never smoked. In fact, up to 20% of lung cancers occur in people without a history of smoking. While smoking remains the leading risk factor, other contributors include secondhand smoke, air pollution, exposure to radon and a family history of lung cancer.
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Originally published on Medical Xpress on 3/5/2026