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. Secondhand smoke and secondhand aerosol Thirdhand Smoke Resource Center Protecting Californians Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Study shows second hand vaping exposure very low compared to second hand smoking Is Secondhand Vape Smoke Bad for You? Baton Rouge General