how does cigarette smoke cause cancer The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking How tobacco* impacts your health
How tobacco* impacts your health All Forms of Cigarette Smoke Exposure are Harmful to our Cells and DNA Thirdhand Smoke Resource Center How cigarette smoke skews immune responses to promote infection, lung disease and cancer Nature Reviews Immunology People ignorant of cancers caused by smoking
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