Flavored e cigarettes are not harmless. Doctors are now seeing teens with permanent lung damage from vaping. In the U.S., a teenager developed popcorn lung after vaping in secret for three years. This Vaping and COPD Does vaping cause Popcorn Lung? Vaperite Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica What Does Vaping Do to Your Lungs? Johns Hopkins Medicine