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 & Kids Paul Young MD Second hand vape smoke linked to more asthma symptoms in kids Protect Children Against Secondhand Smoke Hanley Foundation Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record