Secondhand smoke and its risk to children

Secondhand smoke 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. This mixture contains more than 4,000 substances, more than 40 of which are known to cause cancer in humans or animals, and many of which are strong irritants.

Exposure to secondhand smoke is called involuntary smoking, or passive smoking.

Secondhand smoke can cause lung cancer in nonsmokers

Secondhand smoke has been classified by the Environmental Protection Agency (EPA) as a known cause of lung cancer in humans. Passive smoking is estimated by EPA to cause approximately 3,000 lung cancer deaths in nonsmokers each year.

Secondhand smoke is a serious health risk to children

The developing lungs of young children are also affected by exposure to secondhand smoke. Infants and young children whose parents smoke are among the most seriously affected by exposure to secondhand smoke, being at increased risk of lower respiratory tract infections such as pneumonia and bronchitis.

EPA estimates that passive smoking is responsible for between 150,000 - 300,000 lower respiratory tract infections in infants and children under 18 months of age annually, resulting in between 7,500 - 15,000 hospitalizations each year.

Children exposed to secondhand smoke are also more likely to have reduced lung function and symptoms of respiratory irritation like cough, excess phlegm, and wheeze.

Passive smoking can lead to buildup of fluid in the middle ear, the most common cause of hospitalization of children for an operation.

Asthmatic children are especially at risk. EPA estimates that exposure to secondhand smoke increases the number of episodes and severity of symptoms in hundreds of thousands of asthmatic children. EPA estimates that between 200,000 - 1 million asthmatic children have their condition made worse by exposure to secondhand smoke. Passive smoking may also cause thousands of non-asthmatic children to develop the condition each year.

Created by the Environmental Protection Agency. Illustration copyright A.D.A.M., Inc.

 

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Review Date: 5/16/2007

Reviewed By: Alan Greene, M.D., F.A.A.P., Department of Pediatrics, Packard Children's Hospital, Stanford University School of Medicine; Chief Medical Officer, A.D.A.M., Inc.


The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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