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 Tobacco Smoke, Vaping, and Asthma AAFA.org Secondhand vape plumes could form lung damaging radicals American Chemical Society Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times