CDC recommends that you should not use e cigarette, or vaping, products that contain THC, particularly from informal sources. Data suggest these products play a major role in the current lung injury outbreak. E cigarette top 3 Comparative study of lung toxicity of E cigarette ingredients to investigate E cigarette or vaping product associated lung injury ScienceDirect New lung scans prove vaping is toxic. The science is officially in. Scans show that teens have developed "popcorn lung" as a result of vaping. It's a permanent, chronic disease that shortens Health effects and known pathology associated with the use of E cigarettes ScienceDirect