Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Vaping in pregnancy Essential Parent Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association 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 more about the dangers of smoking Animal Study Shows Harmful Effects of Secondhand Smoke Even Before Pregnancy Duke Health Is Secondhand Vape Smoke Bad For Pregnancy? Experts Explain The Risks