A few weeks ago they were investigating symptoms similar to HAPE - High Altitude Pulmonary Edima. Basically, you get blood clots and those go into the heart to

A few weeks ago they were investigating symptoms similar to HAPE - High Altitude Pulmonary Edima. Basically, you get blood clots and those go into the heart to the lungs and block the blood vessels (killing parts of the lungs) and presumably other parts of the body. You also get the cyto storm. So it's not surprising that it's causing damage everywhere. I wouldn't be surprised if asymptomatic people have some damage, but not enough to cause noticable symptoms.