The Chemistry Behind Vapes Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy 25% of grade 12 students now #vape in the US. Even with a scarcity of data, we know vaping causes #airway injury. We are heading towards a vaping related #COPD and #lungcancer epidemic Health effects in COPD smokers who switch to electronic cigarettes: a COPD Dove Medical Press Vaping and COPD: more harm than once promised Galaxus Vaping doubles risk of serious lung disease, even without smoking history study Professor Erwin Loh