Scientists have identified a persistent change in a handful of blood proteins in people with long Covid that indicates that an important part of their immune system remains on high alert for months ...

Long Covid patients suffer from chronic symptoms such as fatigue or shortness of breath. As researchers have discovered, this is to some extent due to a part of our immune system called the complement ...

A research team at the Medical University of South Carolina reports in Cells that the complement system, part of the body's natural immune defenses, is a key driver of inflammatory responses that ...