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. According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% E Cigs and Second Hand Vaping: Dangers and Protections Secondhand e cigarette vape smoke exposure increased in last 4 years, contain harmful toxins: JAMA Network study ABC7 Chicago Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Can I be Affected by Secondhand Vape Smoke?