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. Stay Safe! Don't Vape. Vaping puts you at risk of exposure to many harmful chemicals. Teens are especially sensitive to nicotine's addictive effects because their brains are still developing. Please partner with What Does Vaping Do to Your Lungs? Johns Hopkins Medicine What We Know About Vaping Smokefree