Characterizing the Transient Emission of Particles and Gases from a Single Puff of Electronic Cigarette Smoke Chemical Research in Toxicology 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. Vaping Related Illness and Lung Disease NEJM Vaping harms your health Cancer Institute NSW