In secondhand vape, scientists smell risk American Heart Association How Secondhand Smoke Affects Children and Pregnant Women Early life secondhand smoke exposure assessed by hair nicotine biomarker may reduce children's neurodevelopment at 2 years of age ScienceDirect 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 The Impact of E Cigarettes and Asthma: What You Need to Know