Smoking a pack a day for a year causes 150 mutations in lung cells

https://www.sciencedaily.com/releases/2016/11/161103140559.htm

Scientists have measured the catastrophic genetic damage caused by smoking in different organs of the body and identified several different mechanisms by which tobacco smoking causes mutations in DNA. Researchers found smokers accumulated an average of 150 extra mutations in every lung cell for each year of smoking one packet of cigarettes a day.

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