Experts say that flavored e cigarettes can cause irreversible lung damage. A U.S. teen developed "popcorn lung" after secretly vaping for 3 years a permanent, life altering disease. Officially known as bronchiolitis obliterans, Is Vaping Safer than Smoking? New Directions for Women E cigarette flavors are toxic to white blood cells, warn scientists Frontiers The new nicotine epidemic: understanding the systemic harms of e cigarettes in the adolescent population Medical infograph. The infograph was developed by the Consumer Download Scientific Diagram