Long Covid study finds abnormality in lungs that could explain breathlessness

 https://www.theguardian.com/society/2022/jan/29/long-covid-study-finds-abnormality-in-lungs-that-could-explain-breathlessness

Abnormalities have been identified in the lungs of long Covid patients that could offer a potential explanation for why some people experience breathlessness long after their initial infection.

The findings, from a pilot study involving 36 patients, raise the possibility that Covid may cause microscopic damage to the lungs that is not detected using routine tests.

Breathlessness is a symptom in the majority of long Covid patients, but it has been unclear whether this is linked to other factors such as changes in breathing patterns, tiredness, or something more fundamental.