The Dangerous Flavors of E-Cigarettes

Nicotine is amazingly addictive. About 20 years ago, researchers in a nearby laboratory were studying the effects of cigarette smoke on lung function in mice. To expose a mouse to cigarette smoke, the mouse is placed in a plastic tube, head out. The tube is positioned in a stream of smoke, which the mouse then breathes. On the day of the first exposure, it is difficult to get the mouse to enter the tube. But on the second exposure, most mice run right into the tube. In contrast, mice not exposed to tobacco smoke on the first day continue to . . .