Half    as    many    exposed to secondhand smoke over past decade, CDC reports

February 4, 2015 4:35 AM

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Americans’ exposure to secondhand smoke declined by half over the past decade, federal health authorities reported on Tuesday, as states and municipalities banned smoking in bars, restaurants and offices, and fewer Americans smoked inside their homes.

The share of U.S. nonsmokers exposed to secondhand smoke fell to 25 percent in 2012 from 53 percent in 2000, according to an analysis of federal health data by the Centers for Disease Control and Prevention. Exposure was determined by testing for cotinine, a marker of nicotine in the blood.

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