Changing Perceptions of Harm of E-Cigarettes Among U.S. Adults, 2012–2015

Although the impact of long-term use of electronic cigarettes (e-cigarettes) on health is still unknown, current scientific evidence indicates that e-cigarettes are less harmful than combustible cigarettes. The study examined whether perceived relative harm of e-cigarettes and perceived addictiveness have changed during 2012-2015 among U.S. adults.Data were from Tobacco Products and Risk Perceptions surveys of probability samples representative...