Heated Tobacco Products Smoking and Tobacco Use CDC Smoking vs. Vaping Vapes vs. Cigarettes IQOS UK Vaping refers to the use of an electronic cigarette, or other vaping device, to breathe in an aerosol, often containing nicotine, flavouring and other chemicals. Unlike cigarette smoking, vaping doesn't burn tobacco. Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science The difference between smoking, vaping, and using heated tobacco, according to a new scientific study