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 Secondhand Smoke and Electronic Cigarette Aerosols US EPA E Cigarettes (Vapes) Smoking and Tobacco Use CDC How to Quit Vaping: A Practical Guide Can You Get Secondhand Smoke From Vapes Can You Get Second hand Smoke From A Vape