do cigarettes really cause lung cancer Pack Years of Smoking and Risk Aetiology: Crucial clues | Nature
Aetiology: Crucial clues Nature Smoking: Effects, Risks, Diseases, Quitting & Solutions Lung Never too late to quit protective cells could cut risk of lung cancer for ex smokers EurekAlert! The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase cancer risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking
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