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 E Cigarette acute effect on symptoms and airway inflammation: comparison of nicotine with a non nicotine cigarette Flavor induced inflammation and cytotoxicity in human aortic smooth muscle cells: Potential implications for E cigarette safety ScienceDirect Impact of e cigarette vaping on the immune system across the body Physiological Reviews American Physiological Society