Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Secondhand smoke and aerosol 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 Secondhand Smoke Exposure During Pregnancy and Mothers' Subsequent Breastfeeding Outcomes: A Systematic Review and Meta Analysis Scientific Reports Characteristics of second hand exposure to aerosols from e cigarettes: A literature review since 2010 ScienceDirect Breast Cancer & E Cigarettes: Is Vaping a Safer Alternative to Smoking? Maurer Foundation