Yes, vaping is toxic. A U.S. teen developed "popcorn lung" after secretly vaping for three years a permanent, life altering disease. Officially known as bronchiolitis obliterans, the condition scars the lungs' tiniest PLEURAL EFFUSION WITH ELECTRONIC CIGARETTE USE: A NOT SO SAFE ALTERNATIVE TO TOBACCO SHM Abstracts Society of Hospital Medicine Health experts are raising the alarm and we need to pay attention. Popcorn lung, medically known as bronchiolitis obliterans, is a serious and permanent lung condition linked to chemicals that have E Cigarette Use, Small Airway Fibrosis, and Constrictive Bronchiolitis NEJM Evidence