Secondhand smoke and secondhand aerosol Secondhand smoke and secondhand aerosol Why Vaping Matters With and Without Nicotine Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Is vaping more harmful than smoking cigarettes? More people incorrectly think so: Newsroom UT Southwestern, Dallas, Texas Sleeping baby safety tip: Keep baby's environment smoke and vape free. Secondhand smoke in areas where a baby sleeps or spends time, like home or the car, increases the risk of health problems.