Popcorn Lung and Vaping: Debunking the Myths Asia Harm Reduction Alliance A recent case involving a U.S. teenager who developed Bronchiolitis Obliterans, commonly called popcorn lung, after three years of secretly vaping has raised serious concerns about the risks of e cigarettes. This irreversible Tobacco Harm Reduction: Risk Perceptions Lungs After Smoking: Understanding Popcorn Lung from Vaping