Does Vaping Cause Secondhand Smoke? Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN What is Vaping? Vaping Dangers Ashley Addiction Treatment Animal Study Shows Harmful Effects of Secondhand Smoke Even Before Pregnancy Duke Health How Secondhand Smoke Affects Children and Pregnant Women 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