​Centers for Disease Control and Prevention identifies vitamin E as the likely cause of US lung injuries

The US Centers for Disease Control and Prevention (CDC) has identified vitamin E acetate as a ‘chemical of concern’ in the recent outbreak of ‘e-cigarette associated lung injury’ (EVALI) in the US. The chemical has been used as a thickening agent in illicit or black market e-liquids in the US and was found in 100% of the lung fluid samples submitted to the CDC. TCH (tetrahydacannibinol, a key psychoactive ingredient in cannabis) was found in 82% of the samples and nicotine in 62%. As of 20 November 2019, the CDC has identified 2,290 cases of EVALI and 47 deaths.

Source: https://www.cdc.gov/tobacco/basic_information/e-cigarettes/severe-lung-disease.html