... and not in a good way!
TIME:
As if the growing number of smoking bans in restaurants, airplanes and other public places isn't sending a strong enough message, researchers now have the first biological data confirming the health hazards of secondhand smoke.
Scientists led by Dr. Ronald Crystal at Weill Cornell Medical College documented changes in genetic activity among nonsmokers triggered by exposure to secondhand cigarette smoke. Public-health bans on smoking have been fueled by strong population-based data that links exposure to secondhand cigarette smoke and a higher incidence of lung diseases such as emphysema and even lung cancer, but do not establish a biological cause for the correlation. Now, for the first time, researchers can point to one possible cause: the passive recipient's genes are actually being affected.
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