Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Does Vaping Cause Secondhand Smoke? Secondhand vape exposure: Risks and side effects Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs.