How can I protect my child from thirdhand smoke in homes? Thirdhand Smoke Resource Center 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. Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine