Electronic Cigarette Use Linked to Higher COPD Risk in US, Study Says A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, 5 year longitudinal study finds e cigs and cigs have similar risks for respiratory disease and COPD; dual use is worse Stanton Glantz blog Passive Vape Exposure From E Cigarettes Linked to Acute Health Effects in COPD Pulmonology Advisor COPD Dove Medical Press Potentially Dangerous Modifications to E Cigarettes Common Drugs.com MedNews