In addition to the others that have already been listed here, there's recent research pointing to elevated levels of both ANG-1 and P-SEL[1], a combination of elevated cytokines and lowered cortisol levels[2], and changes in mitochondrial proteins from neurons[3].
Biomarkers by nature can be extremely difficult to track down.
Biomarkers by nature can be extremely difficult to track down.
[1]: https://molmed.biomedcentral.com/articles/10.1186/s10020-022...
[2]: https://www.webmd.com/covid/news/20230106/researchers-hunt-l...
[3]: https://www.ucsf.edu/news/2022/05/422906/long-covid-blood-ma...