6 important things to know about IQOS What are electronic cigarettes (e cigarettes)? Simple and Practical Mental Health E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA E cigarettes and vaping DrugWise When authority describes a product, the public believe it's accurate because they trust authority. When you compare the definition of an e cigarette from a dictionary vs the CDC, it's very clear that