Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals 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. Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center