The risks of secondhand smoke Tommy's 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 Control Chronic Disease Prevention & Health Promotion Division Electronic Cigarettes Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Nicotine Smoking, 'Vaping', and Breastfeeding La Leche League Canada