Do Cigarettes Cause Lung Cancer?

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British cancer researchers say that one good way to illustrate the effect tobacco has on the body is to understand that 15 cigarettes equals one DNA mutation. Scientists described a pack of cigarettes as as game of Russian Roulette that causes a smoker to have one lung cancer mutation for every 15 cigarettes smoked. The study, published in the journal Nature, suggests that some mutations land outside the dangerous zone in the genome, but others will hit a cancer gene.

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