Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign. 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 Digital Download Materials "Secondhand Smoke" Maine Prevention Store Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London