Persistent complement dysregulation with signs of thromboinflammation in active Long Covid (19 January 2024)

Summary

This study compared the blood of patients with confirmed Covid-19 infection with that of uninfected controls. The authors found that there were changes to serum proteins in the blood of patients experiencing Long Covid. This indicates activation of the immune system’s complement cascade, altered coagulation and tissue injury. At the cellular level, Long Covid was linked to aggregates comprising monocytes and platelets. These findings provide knowledge of potential biomarkers for diagnosis and may inform directions for treatments.