PDF) E Cigarettes are More Addictive than Traditional CigarettesA Study in Highly Educated Young People Changes in cigarette and e cigarette use among US young adults from before to during the COVID 19 pandemic: News exposure and risk perceptions as potential predictors An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link Harvard scientist finds microbial contaminants in e cigs Harvard Gazette E cigarette flavors decrease perception of harm among youth Department of Family Medicine Teenagers Keep Vaping Despite Crackdowns on E Cigarettes The New York Times