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 Kids Health Info : Vaping and e cigarettes Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health Impact of vaping on respiratory health The BMJ