Persistent SARS-CoV-2 Infection, EBV, HHV-6 and Other Factors May Contribute to Inflammation and Autoimmunity in Long COVID.
Vojdani, Aristo, Vojdani, Elroy, Saidara, Evan et al. · Viruses · 2023 · DOI
Quick Summary
This review examines how long COVID—a condition where symptoms persist months after a coronavirus infection—may develop through similar mechanisms to ME/CFS. The authors suggest that viral persistence, reactivation of old herpes viruses (like Epstein-Barr virus), immune system dysfunction, and gut microbiome changes may all contribute to ongoing inflammation and autoimmune problems. They propose testing for antibodies and other markers to better identify and treat long COVID.
Why It Matters
This review strengthens the connection between long COVID and ME/CFS by identifying shared biological mechanisms, suggesting that insights from ME/CFS research may inform long COVID management and vice versa. For ME/CFS patients, the proposed diagnostic markers could potentially improve early identification and stratification of disease subtypes. The multi-factorial framework validates patient experiences of complex, multi-system illness.
Observed Findings
Persistent SARS-CoV-2 infection has been detected in some long COVID patients
Reactivation of latent herpesviruses (EBV, HHV-6) has been observed in subsets of long COVID cases
Immune dysregulation and chronic inflammation are common patterns in both long COVID and ME/CFS
Gut microbiome disturbances have been reported in long COVID patients
Autoimmune phenomena and multiple tissue-specific antibodies have been documented in some affected individuals
Inferred Conclusions
Long COVID and ME/CFS share overlapping pathogenic mechanisms involving viral persistence, herpesvirus reactivation, and immune dysregulation
Multi-marker diagnostic testing could improve clinical characterization and management of long COVID
A systems-level approach addressing viral, immune, and microbiota factors may be necessary for effective treatment strategies
Remaining Questions
Which specific biomarker combinations best predict disease severity or treatment response in long COVID?
What is the causal relationship between viral persistence/reactivation and autoimmune activation—does one trigger the other or do they occur independently?
What This Study Does Not Prove
This review does not prove that viral persistence or herpesvirus reactivation *causes* long COVID or ME/CFS—it identifies associations and proposes mechanisms without definitive causal evidence. The proposed diagnostic tests are suggested but not validated clinically in this paper. This work does not establish that all long COVID cases follow the same pathogenic pathway.