On the subject of smoking, health risks differ from one form of smoking product to another. Yet these differences aren't always well understood by health professionals. Is there such a thing as a "safe" tobacco alternative, or is smoking cessation the only viable choice for risk reduction?Joining Dr. Brian McDonough to discuss the literature on tobacco harm reduction, as well as review the broadening spectrum of smoking formulations, from cigarettes to smokeless tobacco products to e-cigarette devices, is Dr. Brad Rodu, Endowed Chair in Tobacco Harm Reduction Research from the University of Louisville School of Medicine.