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Pack years is a way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org lung Calculating Smoking Pack Years Health BeatHealth Beat How Many Cigarettes in a Pack? (2025 Guide) Calculating Pack Years: How to measure how much you smoke Roswell Park Comprehensive Cancer Center Buffalo, NY 20 years of smoking Since I was 13 years old. : r stopsmoking
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