Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London 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 Secondhand smoke and secondhand aerosol Is it risky to smoke or vape around companion animals? RSPCA Knowledgebase Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy