Does Vaping Cause Secondhand Smoke? Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Vaping before, during and after pregnancy: leaflets and infographics ASH How secondhand smoke, thirdhand smoke & vaping affects kids 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 Vape residue may harm unborn babies