Teen Smoking UT MD Anderson 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 In secondhand vape, scientists smell risk American Heart Association ? () Although often promoted as safer than traditional cigarettes, e cigarettes still harm the body in many ways. 1. Health Risks Most vapes contain nicotine, Massachusetts new vaping campaign done with student input masslive.com