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Smoking cessation will reduce smokers’ risk of tobacco-related morbidity and mortality in the short and long term.



Smoking cessation can substantially reduce the global burden of tobacco-related illness and death. It is estimated that reducing global adult smoking rates by one-third by 2025 would avert more than 200 million tobacco-related deaths during the rest of the century.
The immediate health benefits of quitting include a 50% reduced risk of coronary heart disease and a decrease in respiratory symptoms and infections. Long-term health benefits are substantial. Risks of lung cancer, other cancers, heart attack, stroke, and chronic lung disease are significantly reduced. Smokers who quit before age 40 reduce their risk of death relative to continuing smokers by 90% and gain 9 years of life expectancy. Smokers who quit before age 55 gain 6 years of life expectancy. A study from Japan estimated that if the proportion of smokers making a quit attempt per year gradually increased from 8% to the US level of 42.5%, lung cancer mortality and cardiovascular mortality would be reduced by 46,000 and 56,000 deaths over 20 years, respectively. 



U.S. Department of Health and Human Services. The Health Benefits of Smoking Cessation: A Report of the Surgeon General. Rockville, MD: US Department for Health and Human Services, 1990.

Avila-Tang E, Apelberg BJ, Yamaguchi N, Katanoda K, Sobue T, Samet JM. Modelling the health benefits of smoking cessation in Japan. Tob Control. 2009;18(1): 10-17.

Jha P, Ramasundarahettige C, Landsman V, Rostron B, Thun M, Anderson RN, McAfee T, Peto R. 21st-Century hazards of smoking and benefits of cessation in the United States. N Engl J Med. 2013;368:341-350.

Jha P, Peto R. Global effects of smoking, of quitting, and of taxing tobacco. N Engl J Med. 2014; 370: 60-68.

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