Is Second Hand Vape Smoke Bad For You? Learn How to Avoid its Side Effects The Impact of E Cigarettes and Asthma: What You Need to Know Breathing in someone else's smoke or vape isn't harmless. Secondhand smoke exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de 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.