Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports Plain packaging may help tackle teen vaping UCL News UCL University College London Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. Online vape retailers ignore rules protecting minors, study finds Los Angeles Times Teens vaping more flavored marijuana and less nicotine, study finds