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 Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Second hand vape smoke linked to more asthma symptoms in kids Project Filter Secondhand Vape Informational Poster #2 Idaho Health Tools Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Tobacco Smoke, Vaping, and Asthma AAFA.org