how many cigarettes a day is considered a light smoker do you smoke per day? Pack-years is a way to

Pack years is a way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org lung Many people think smoking only on the weekends or at parties is harmless, but doctors warn there is no safe amount of tobacco. Find out how even occasional smoking damages your heart Social smoking: Will an occasional cigarette damage your health? ABC News Prevalence (%) of Heavy Smoking vs Light Smoking, Ages 25 64,1985; Download Table Smokers Die Ten Years Sooner Than Non Smokers Many lighter smokers can be addicted to cigarettes

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