It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years. How a wave of mysterious illnesses sparked an e cig crackdown. Heres what you need to know Lung Injuries Associated with Use of Vaping Products FDA Vaping Illness Tracker: 2,506 Cases and 54 Deaths The New York Times