Beware the danger of secondhand smoke
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Of the 214 people in the study, 33 said they'd been exposed to other people's cigarette smoke within a week of being hospitalized. And while nearly all of the participants knew that secondhand smoke was harmful to nonsmokers, about half were "not at all" worried about their own exposure. Saliva testing for cotinine, a marker of nicotine exposure, found detectable levels in 29 of 72 people tested.
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