Elevated risk of developing COPD with e cigarette use: Study 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, 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 Chronic Obstructive Pulmonary Disease (COPD)