First comparison of dangers of tobacco cigarettes, e cigarettes and waterpipes Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health. Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Health Effects of Vaping HealthMatch Vaping may be safer than cigarettes, but it's not safe