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, or Vaping, Product Use Associated Lung Injury (or EVALI): What you need to know Tobacco Atlas Comparative study of lung toxicity of E cigarette ingredients to investigate E cigarette or vaping product associated lung injury ScienceDirect Compromised blood vessel function caused by cigarettes and e cigarettes is mediated by lung irritation Stanton Glantz blog