Imagine What Zero Seconds of Exposure Would Do

Michael Siegel notes that the amount of time it takes for secondhand smoke to do just as much as damage to your cardiovascular system as decades of smoking keeps dropping. The Minnesota Association for Nonsmokers is now claiming "research studies have shown that even just thirty seconds of exposure to secondhand smoke can make coronary artery function of non-smokers indistinguishable from [that of] smokers." Tobacco smoke apparently defies the ordinary rules of toxicology, becoming steadily more dangerous as the dose becomes smaller.