Tobacco Smoke, Vaping, and Asthma AAFA.org Vape Residue May Harm Unborn Babies' Immune Systems Respiratory Therapy Frontiers World no tobacco: effects of second hand smoke (SHS) and vapors on the developing and adult brain 2nd Hand Vape Smoke And Pregnancy In the United States, about 8% of all women who are pregnant smoke cigarettes, and another roughly 4% report using electronic cigarettes or vapes. To learn Vaping before, during and after pregnancy: leaflets and infographics ASH Animal Study Shows Harmful Effects of Secondhand Smoke Even Before Pregnancy Duke Health