Secondhand Vape Exposure: Effects, Who's at Risk, and More Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Smoking in pregnancy Deadly Choices 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. Vape Residue May Harm Unborn Babies' Immune Systems Respiratory Therapy Secondhand smoke and secondhand aerosol