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. Second hand smoke is highly toxic. Here's what happens when pregnant women and their babies are exposed to second hand smoke. Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN What Is Secondhand Smoke? Healthy Delaware