Vaping Indoors and How it Contributes to Sick Home Syndrome Bactronix 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 Tobacco Smoke, Vaping, and Asthma AAFA.org Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine