Secondhand smoke is a mixture of the smoke that comes from the burning end of a cigarette, cigar, or pipe, and the smoke breathed out by the smoker. It contains more than 7,000 chemicals. Hundreds of those chemicals are toxic and about 70 can cause cancer.
Health effects of secondhand smoke include
- Ear infections in children
- More frequent and severe asthma attacks in children
- Heart disease and lung cancer in adults who have never smoked
There is no safe amount of secondhand smoke. Even low levels of it can be harmful. The only way to fully protect nonsmokers from secondhand smoke is not to allow smoking indoors.
Centers for Disease Control and Prevention
- Let's Make the Next Generation Tobacco-Free: Your Guide to the 50th Anniversary Surgeon General's Report on Smoking and Health (Department of Health and Human Services) - PDF
- Secondhand Smoke (American Cancer Society) Also in Spanish
- Secondhand Smoke (Centers for Disease Control and Prevention)
- Secondhand Smoke (National Cancer Institute)
- Secondhand Smoke and Cancer (National Cancer Institute) Also in Spanish
- Secondhand Smoke: What It Means to You (Centers for Disease Control and Prevention) - PDF
- Secondhand Tobacco Smoke and Smoke-free Homes (Environmental Protection Agency) - PDF - In English and Spanish
- Smoke-Free Public Housing Cuts Secondhand Fumes (02/09/2017, HealthDay)
- Secondhand (and Third-Hand) Smoke May Be Making Your Pet Sick (12/01/2016, Food and Drug Administration)
Prevention and Risk Factors
- BeTobaccoFree.gov (Department of Health and Human Services)
- Cancer and Tobacco Use (Centers for Disease Control and Prevention) Also in Spanish
- Health Harms from Secondhand Smoke (Campaign for Tobacco-Free Kids) - PDF
- Second Hand Smoke: Danger (Centers for Disease Control and Prevention)
- Thirdhand Smoke: What Are the Dangers to Nonsmokers? (Mayo Foundation for Medical Education and Research)
Statistics and Research
- CDC Vital Signs: Secondhand Smoke Also in Spanish
- CDC Vital Signs: Tobacco Use and Secondhand Smoke (Centers for Disease Control and Prevention)
- Exposure to Cigarette Smoke Reduces Vitamin D3 in the Blood Stream and Respiratory Tract (American Academy of Allergy, Asthma, and Immunology)
- Health Effects of Secondhand Smoke (Centers for Disease Control and Prevention)
- ClinicalTrials.gov: Tobacco Smoke Pollution (National Institutes of Health)
Journal ArticlesReferences and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Infant's DNA Methylation Age at Birth and Epigenetic Aging Accelerators.
- Article: The comparative in vitro assessment of e-cigarette and cigarette smoke...
- Article: Randomized comparison of group versus individual educational interventions for pregnant...
- Secondhand Smoke -- see more articles
- How We Can Protect Our Children from Secondhand Smoke (Centers for Disease Control and Prevention)
- Secondhand Smoke and Children (American Academy of Otolaryngology--Head and Neck Surgery)
- 8 Things You Can Do to Protect Your Family from Secondhand Smoke (National Cancer Institute)