Complete Guide to Secondhand Vaping Devices Vape Direct Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Tobacco Smoke, Vaping, and Asthma AAFA.org The Dangers of Secondhand & Thirdhand Smoke Exposure