Pregnant Women in NC Exposed to Less Secondhand Nicotine After 'Smoking Ban' Duke Health Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice What Chemicals Are Present in Secondhand Vape Emissions? 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