The electronic cigarette is also known as the E-Cigarettes

Research into the effects of e-cigarettes lags behind their popularity. But ready or not, the era of e-cigarettes is here. It’s a booming, billion-dollar industry -- on track to outsell tobacco products within a decade. The number of teens and tweens using these products doubled between 2011 and 2012.

How E-Cigarettes Work
They look like the real thing. The end glows as you inhale. As you
exhale, you puff out a cloud of what looks like smoke. It's vapor,
similar to the fog you might see at rock shows, says M. Brad Drummond, MD. He's an assistant professor of medicine at Johns Hopkins University School of Medicine.
All e-cigarettes work basically the same way. Inside, there's a battery, a heating element, and a cartridge that holds nicotine and other liquids and flavorings. Features and costs vary. Some are disposable. Others have a rechargeable battery and refillable cartridges.
Using an e-cigarette is called "vaping."

Questions we keep asking is are vapers liable to die young?