A analysis of more than 100 studies found the vaping can have long term health consequences. What does recent biomarker literature say about the likely harm from e cigarettes? PHCC Electronic cigarette Wikipedia The impact of e cigarettes versus traditional cigarettes on long term cardiopulmonary outcomes American Journal of Physiology Heart and Circulatory Physiology American Physiological Society PDF) Patterns of E Cigarette Use Among Youth and Young Adults: Review of the Impact of E Cigarettes on Cigarette Smoking Latest Cochrane Review finds high certainty evidence that nicotine e cigarettes are more effective than traditional nicotine replacement therapy (NRT) in helping people quit smoking Cochrane