Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Safety for Vaping Around Pets Bayside Animal Hospital Bayside Animal Hospital Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy 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.