if you smoke a pack of cigarettes a day Why social smoking can be just as bad for as daily smoking Don't let smoking sneak up

Don't let smoking sneak up on you! A simple calculation can tell you your pack year history., Heres how it works:, number of packs per day X number of years smoking, For example, if you smoke one Smoking Before 18 Tied to Increased Respiratory Symptoms in Young Adults Respiratory Therapy Smoking One Pack of Cigarettes Per Day Causes 150 Extra Mutations in Lung Cells Respiratory Therapy Pack years is a way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org lung

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