COVID-19 is an illness triggered by an infection called SARS-CoV-2. The infection– and your body immune system’s response to it, swelling– can harm your lungs, triggering them to scar and stiffen or fill with fluid.
This video is by the National Heart, Lung, and Blood Institute (NHLBI), part of the National Institutes of Health (NIH).
Learn more: https://www.nhlbi.nih.gov/coronavirus
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