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 secondhand aerosol Digital Download Materials "Secondhand Smoke" Maine Prevention Store When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to Secondhand vape exposure: Risks and side effects Secondhand Smoke Vermont Department of Health