Health experts warn of vaping dangers and link to COPD Vaping doubles risk of serious lung disease, even without smoking history study Professor Erwin Loh Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy What COPD Patients Should Know About Vaping and E Cigarettes LPT Medical Health effects in COPD smokers who switch to electronic cigarettes: a COPD Dove Medical Press