New data show nearly 800,000 teens vaped for the first time in the past year, as FDA is set to announce first major decision to remove a popular e cigarette brand FDA warns retailers against illegal sale of e cigarettes to children PBS News Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times How E Cigarettes Work E cigarettes can produce more formaldehyde than regular cigarettes, study says Los Angeles Times