3 harmful substances in tobacco smoke Chemicals Cigarettes: From Plant to Product to Puff About E-Cigarettes (Vapes) | Smoking

Further, since epidemiological studies have consistently shown high rates of concurrent use of multiple tobacco products [34,35,36], therefore the impact of concurrent exposures to two products (HTPs plus combustible cigarettes and HTPs plus e-cigarettes) on pulmonary health needs to be evaluated and compared to exclusive exposure to alternative tobacco product and abstinence from all tobacco products

This is not the first time vaping has been found to impact blood vessel function

A., Maejima, K

The math is obvious: if there is a significant illicit trade problem, it cannot exist without the involvement of the big four tobacco companies