Vaping—not prior smoking—is associated with changes in gene regulation linked to disease

Since they hit the market, e-cigarettes have been touted as a safe alternative to tobacco cigarettes for adult smokers. When research began to suggest otherwise, many questioned whether smoking was still to blame for adverse effects, since most vapers are either "dual users" who also smoke cigarettes or have a prior history of smoking.

source https://medicalxpress.com/news/2021-11-vapingnot-prior-smokingis-gene-linked.html