Secondhand smoke from vaping could be harmful to children: study ABC13 Houston Secondhand Smoke Vermont Department of Health Juul study shows secondhand vaping emissions are less toxic than cigarette smoke 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