Battling unregulated vapes, Big Tobacco tries a new strategy: joining in F.D.A. Authorizes E Cigarettes to Stay on U.S. Market for the First Time The New York Times Can vaping damage your lungs? What we do (and don't) know Harvard Health Randomized clinical studies assessing the pharmacokinetics and subjective effects of vuse alto electronic nicotine delivery systems Scientific Reports Fears vaping could cause Cancer Healthwatch Barnsley E Cigarettes and Pregnancy Maternal Infant Health CDC