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 Electronic Cigarette Aerosol and Indoor Air Quality US EPA ' . , Can I be Affected by Secondhand Vape Smoke? Ever puffed a vape around others thinking it's harmless? Think again. Inhaling vapor from e cigarettes exposes you to harmful chemicals, such as formaldehyde. These toxic substances can be passed on to Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN