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, Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review COPD: Chronic Bronchitis vs. Emphysema COPD is an umbrella term that commonly includes chronic bronchitis and emphysema, two conditions with very different presentations. Chronic Bronchitis (Blue Bloater) Productive cough E Cigarettes May Cause COPD. Here's Why Prince Court Medical Centre Frontiers Chronic obstructive pulmonary disease (COPD) and COPD like phenotypes