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An acute exacerbation of COPD is defined as increased shortness of breath, increased sputum production, a change in the color of the sputum from clear to green or yellow, or an increase in cough in someone with COPD.
Not everyone who has the chronic obstructive pulmonary disease (COPD) has an active lung infection. But, people with COPD are predisposed to lung infections. And having a lung infection when you are diagnosed with COPD can be quite serious. Lung infections can cause COPD exacerbations. In fact, it's estimated that up to 80 percent of exacerbations are caused by respiratory infections. These flare-ups may result in lower quality of life, worsening lung disease, hospitalization, and even death.