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 Research Shows E Cigarette Vapor Exposure Amplifies Harmful Inflammatory Response in Influenza A Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Vaping Isn't More Harmful Than Smoking Perception Studies Pod Salt UK Tobacco Control Chronic Disease Prevention & Health Promotion Division Electronic Cigarettes Vaping: not a safe alternative to smoking, new study suggests, and it may be more harmful to health than tobacco in normal cigarettes South China Morning Post