BREAKING: New research suggests flavored e cigarettes may be linked to lasting lung injury. Scientists examined how certain flavoring chemicals affect airway cells. Some compounds were associated with inflammation and impaired repair. The Impact of e cigarette vaping on the immune system across the body Physiological Reviews American Physiological Society 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 cigarette Warning: Vaping Triggers Inflammation in the Gut