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 'Popcorn Lung': Vapers at Risk of Irreversible Disease, Experts Warn : ScienceAlert What Causes Does Vaping Cause Popcorn Lung? Africa Harm Reduction Alliance Microwave Popcorn Lungs Australia Popcorn Lung and Vaping: Debunking the Myths Asia Harm Reduction Alliance