Nearly 2 million U.S. adult nonsmokers vape
A study highlights concerns that e-cigs, marketed as a way to stop smoking, may be addictive
![person vaping](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/10/100518_AC_vape_feat.jpg?fit=860%2C460&ssl=1)
E-CIGARETTES ONLY Of the estimated 1.9 million American adults who vape but have never consistently smoked regular cigarettes, the majority were aged 18 to 24 years.
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