Symptoms Of Second Hand Vape Smoke Secondhand smoke is harmful to those around you, putting them Secondhand Smoke and Electronic Cigarette Aerosols US EPA Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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.