See the Vaping Illness Infographic from Ventura County Public Health. Stay aware of the latest news at the California Department of Public Health about Vaping Related Illnesses. CDC has identified vitamin E acetate as a chemical of concern among people with e-cigarette, or vaping, product use associated lung injury. Most patients reported using THC-containing products (the principal psychoactive chemical in cannabis) or both THC & nicotine containing products. Some patients reported using only nicotine-containing products.