CONCLUSIONS: SHS exposure in the last 12 months and over lifetime significantly increases ground-glass opacity in HRCT, suggesting an early or subclinical desquamative interstitial pneumonia/respiratory bronchiolitis. This study further supports that SHS has adverse effects on the lungs that can be detected by X-ray methods.

Secondhand Smoke Fact Sheet
Secondhand smoke, also know as environmental tobacco smoke (ETS), is a mixture of the smoke given off by the burning end of a cigarette, pipe or cigar and the smoke exhaled from the lungs of smokers. It is involuntarily inhaled by nonsmokers, lingers in the air hours after cigarettes have been extinguished and can cause or exacerbate a wide range of adverse health effects, including cancer, respiratory infections, and asthma.1

Main Messages
I would like to draw your attention to several new conclusions that I have reached due to overwhelming scientific evidence.

Secondhand smoke exposure causes heart disease and lung cancer in adults and sudden infant death syndrome and respiratory problems in children.
There is NO risk-free level of secondhand smoke exposure, with even brief exposure adversely affecting the cardiovascular and respiratory system.
Only smoke-free environments effectively protect nonsmokers from secondhand smoke exposure in indoor spaces.
Finally, the Report concludes that, while great strides have been made in recent years in reducing nonsmoking Americans’ secondhand smoke exposure, millions of Americans continue to be exposed to secondhand smoke in their homes and workplaces.
Secondhand Smoke is Harmful to All People

Cardiovascular Effects of Secondhand Smoke
Nearly as Large as Smoking
Joaquin Barnoya, MD, MPH; Stanton A. Glantz, PhD
From the Center for Tobacco Control Research and Education, Cardiovascular Research Institute, and Division of Cardiology, University of California, San Francisco.