Tobacco

20

— minutes, the time it takes for second-hand smoke to cause airway restriction in bystanders in smoke-filled bars and cars. Researchers warn that bystanders may be unaware of how much they are affected by second-hand smoke; while the participants didn't report any breathing problems, their airways showed physiologic changes indicating impaired function

The Major Toll of Secondhand Smoke

Secondhand smoke takes a sizable toll on Americans’ health and productivity, particularly among black Americans, according to a recent study by researchers at the University of California San Francisco (UCSF).

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