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 Tobacco Smoke, Vaping, and Asthma AAFA.org Is Vape Smoke Bad For Second Hand Evidence Mounts About the Health Impact of Second Hand Vaping Frontiers World no tobacco: effects of second hand smoke (SHS) and vapors on the developing and adult brain