Vaping danger Stanford Medicine Dangers Of Vaping, E Cigarettes and JUUL Vaping refers to the act of inhaling and exhaling aerosol, often called vapor, produced by an electronic cigarette or similar device. These devices heat a liquid that usually contains nicotine, flavorings, and Resources on Dangers of Vaping Sauquoit Valley High School Dangers of Teen Vaping and What You Can Do Southern Indiana Community Health Care Vape lettering on danger sign with yellow and black stripes. Electronic e cigarette warning sign Stock Photo Alamy