E cigarettes are changing how nicotine is consumed and perceived. Patterns of use often differ from traditional smoking, with more frequent and prolonged exposure throughout the day. This raises questions about cumulative E cigarettes & Vaping Positive Choices Youth vaping is still a major public health issue. Over 1.6 million U.S. middle & high school students used e cigarettes in 2024. Most chose flavored products designed to hook Science & Tech Spotlight: E cigarettes U.S. GAO E Cigarette and Endothelial FunctionA Critical Review of Preclinical Studies Chemical Research in Toxicology