Adolescents with a regular vaping habit aren't just more likely to take up smoking; they also have higher odds of developing a heavy cigarette habit, a U.S. study suggests.
The research, published in the Journal of the American Medical Association, calls into question whether e-cigarettes can be an effective cessation aid, said lead study author Adam Leventhal, director of the University of Southern California's Emotion and Addiction Laboratory in Los Angeles.
