Parents using e cigs expose kids to dangerous secondhand vapor Futurity Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Second hand vape smoke linked to more asthma symptoms in kids Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Toxic Thirdhand Smoke Residue Reaches Many Children Even in Nonsmoking Homes Research Horizons 9 of the Worst Diseases You Can Get from Secondhand Smoke State of Tobacco Control American Lung Association