UC Davis study: Disposable vapes may be more toxic than cigarettes Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports Changes in expenditure on vaping in the context of the rise of disposable vapes and impending regulatory changes: a population study in Great Britain, 2021 2025 medRxiv Vape Waste 2 Teenage Vaping Declines This Year, Survey Says The New York Times