Pregnant and thinking about quitting smoking or vaping? Quitting is one of the best things you can do for your baby's health. Smoking, vaping, and even second hand smoke can increase the How secondhand smoke, thirdhand smoke & vaping affects kids 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. Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC