Electronic Nicotine Delivery Systems (ENDS) AT Schweiz Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health In recent years, the number of e cigarette users worldwide has sharply increased, with many believing that vaping is less harmful than smoking traditional cigarettes. However, health experts are warning of its negative Tobacco Smoke, Vaping, and Asthma AAFA.org Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Frontiers The new nicotine epidemic: understanding the systemic harms of e cigarettes in the adolescent population