This review published by the Journal of Thrombosis and Haemostasis discusses three potentially intertwined hypotheses, that might contribute to thromboinflammation in Long COVID: (1) lasting structural changes, most prominently endothelial damage, caused during initial infection, (2) a persistent viral reservoir, and (3) immunopathology driven by a misguided immune system.
Thrombo-inflammation in Long COVID – the elusive key to post-infection sequelae? – ScienceDirect