E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA Vaping vs Smoking vs IQOS: Which is Least Harmful? Adverse Neurologic Effects of Electronic Cigarette Use Youth vaping dropped to lowest levels in a decade, federal data shows 6% Nicotine Disposable Vapes 6mg Nicotine Single Use Vape Pens PerfectVape Cigarette smoking and chronic disease in the United States, 20212023 ScienceDirect