How Juul Hooked Teens on Vaping and Ignited a Health Crisis Juul can continue selling e cigarettes as FDA says vaping benefits outweigh risks PBS News Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times