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: Risks and side effects Thirdhand Smoke Resource Center Protecting Californians Secondhand smoke and secondhand aerosol Study uncovers the hidden dangers of secondhand vape exposure to children Second Hand Vaping: Minimal Impact Compared to Smoking