While early research suggests it may not be as dangerous as secondhand smoking, it's still not harmless, experts say. https: www.wate.com news does vaping cause secondhand smoke doctors explain the side effects ?utm_medium=social&utm_source Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association Breathing in someone else's smoke or vape isn't harmless. Secondhand smoke exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de PolitiFact When someone's vaping nearby, what are you breathing in? The risks of vape pens' secondhand aerosols Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine