Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Exposure to second hand nicotine from VAPING doubles risk of young adults developing a wheeze Daily Mail Online Vaping: Clearing the Air Baker Institute Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN