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 Secondhand Vape Exposure: Effects, Who's at Risk, and More How E Cigarettes Affect Your Body Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA