Electronic cigarettes use and 'dual use' among the youth in 75 countries: estimates from Global Youth Tobacco Surveys (20142019) Scientific Reports 2.3% of US population reports current e cigarette use As e cigarette use grows, more research needed on long term effects of vaping American Heart Association E cigarette disparities: Who are the targets? ScienceDirect E cigarette use declines for teenagers Hallmanac E Cigarette Use Linked to Earlier Asthma Onset in Adults Respiratory Therapy