While vaping is not risk free, it is less harmful than tobacco Our World in Data Vaping isn't harmless the warning signs are already here Researchers are now seeing DNA damage, oxidative stress, and epigenetic changes in those who vape early warning signs that point toward increased Blending evidence and empathy a new guide to e cigarettes The Counterfactual New HRB evidence shows e cigarettes are associated with adolescents starting to smoke tobacco cigarettes HRB Health Research Board