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Post  DHF on Wed Mar 16, 2016 6:34 pm

COPD exacerbations happen when your usual COPD respiratory symptoms flare up and become much worse than usual. Many exacerbations are caused by a viral or bacterial lung infection. Air pollution can also be a trigger. However, in about one third of severe exacerbations, the cause cannot be identified.

Read more here: http://www.copd.com/about-copd/exacerbations.html


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