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Cryptogenic Organizing Pneumonia (COP)

Woman wrapped in blanket wipes her nose with a tissue. Woman wrapped in blanket wipes her nose with a tissue.

Cryptogenic organizing pneumonia (COP) is a rare lung condition affecting the small airways (bronchioles) and alveoli (tiny air sacs). It was previously known as idiopathic bronchiolitis obliterans with organizing pneumonia (BOOP).

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