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 Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Children at risk: Emory study uncovers the hidden dangers of secondhand vape exposure Does Second Hand Smoke Kill? SiOWfa16: Science in Our World: Certainty and Controversy Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA