Camilla started experiencing worsening respiratory symptoms while working at a plant that produces greeting cards. Her doctor ordered tests to see what was happening with Camilla’s lungs. The results of two lung function tests showed concerning results. One was a carbon monoxide diffusing capacity test that estimates the ability of the lung to transfer oxygen from the air to the person’s bloodstream. The other was a spirometry test which measures the ability to move air in and out of the lungs. Camilla’s tests showed that her lungs had diminished function compared to other people with healthy lungs. Tests also showed
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