The post-hospitalisation COVID-19 study (PHosp-COVID), published in Nature Medicine, found that people admitted to hospital due to COVID-19 had higher levels of the fibrinogen protein and protein fragment D-dimer, which can cause excess clotting.
Excess blood clotting was found to be a possible cause for symptoms like brain fog and fatigue in long COVID.
Previous research has found that blood clotting can cause a lack of blood supply to the brain or cause fatigue, which both can cause cognitive problems…
