Secondhand vape exposure: Risks and side effects 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. Smoking in pregnancy Deadly Choices Smoking and Pregnancy: The Risks of Vaping Second hand smoke is highly toxic. Here's what happens when pregnant women and their babies are exposed to second hand smoke.