An estimated 88 million nonsmokers in the United States breathe other peoples' tobacco smoke.
Each year, about 46,000 nonsmokers in the United States die from heart disease caused by secondhand smoke.
Secondhand smoke exposure causes an estimated 3,400 lung cancer deaths annually among adult nonsmokers in the United States.
Nonsmokers who are exposed to secondhand smoke at home or work increase their lung cancer risk by 20-30%.
Secondhand smoke exposure is higher among persons with low incomes: 60.5% of persons living below the poverty level in the United States were exposed to secondhand smoke in 2007-2008, compared with 36.9% of persons living at or above the poverty level.