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 E Cigarettes vs. Vaporizers: What's the Difference? E Cigarette vs. Traditional Cigarette: Health Risks, Research Gaps, and Counseling Considerations E Cigarette and E Liquid Regulations in the United States: An Overview