Second hand smoke is highly toxic. Here's what happens when pregnant women and their babies are exposed to second hand smoke. Smoking and Pregnancy: The Risks of Vaping Study uncovers the hidden dangers of secondhand vape exposure to children Vaping before, during and after pregnancy: leaflets and infographics ASH 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. Vape Residue May Harm Unborn Babies' Immune Systems Respiratory Therapy