Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY In secondhand vape, scientists smell risk American Heart Association 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 Effects of Secondhand Smoke: Dangers, Prevention, and More Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC