Early research says secondhand smoke from vaping may not be as bad as cigarettes, but it's still not harmless. https: fox59.com news national world does vaping cause secondhand smoke doctors explain the side effects The Risks of Smoking Weed Every Day Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Can You Get High From Second Hand Weed Vape Smoke Focused on the Facts: Secondhand Marijuana Smoke American Nonsmokers' Rights Foundation