There are many restrictions around vaping and e-cigarettes in countries such as Colombia, Iran and Australia, and New Zealand last year introduced legislation to phase in a near-total tobacco ban through raising the legal age each year
Furthermore, nicotine and chemical constituents of both TS and e-cigs have been reported to interact with the liver cytochrome P450 (CYP-P450) enzymes and affect plasma drug levels of certain central nervous system (CNS) drugs (Zevin and Benowitz 1999
Wang Y, Gao Y, Li X, Sun X, Wang Z, Wang H, Nie R, Yu W, Zhou Y (2020) Coniferyl aldehyde inhibits the inflammatory effects of leptomeningeal cells by suppressing the JAK2 signaling
"Explaining Russell Crowe"
In accordance with that, various immune cells of the innate and adaptive immunity are eventually involved in the inflammatory response (3, 11), arguing for a highly diverse immune cell population and complex cellular interplay in the smoke-induced inflammatory environment