5 cigarettes a day really bad Smoking One Pack of Per Causes 150 Extra Mutations in Lung Cells Pack Years of Smoking and
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[18] Reduced voltage (3.0 V [1] ) e-cigarettes had e-cigarette aerosol levels of formaldehyde and acetaldehyde roughly 13 and 807-fold less than with cigarette smoke
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Morb Mortal Wkly Rep 2016;65:120511
How long does it take your body to recover once you stop smoking

The term Juul, or Juuling, derived from a company that produces e-cigarettes, also is in widespread use
PLoS ONE 10 (2) (2015)
