E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Early research says secondhand smoke from vaping may not be as bad as cigarettes, but it's still not harmless. https: fox59.com news national world does vaping cause secondhand smoke doctors explain the side effects Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking Evidence update on the cancer risk of vaping e cigarettes: A systematic review Secondhand smoke and secondhand aerosol