Dormant Viruses Reactivate in COVID-19 Patients

A study in Nature indicates that dormant viruses reactivate in patients battling COVID-19, extending beyond those with weakened immune systems. Researchers analyzed samples from hospitalized individuals, discovering that viral reactivation, especially from the Herpesviridae and Anelloviridae families, occurred in nearly half of severe COVID-19 cases. These reactivations were observed up to a year after hospital admission, with some viruses reappearing around 20 days post-admission.

Specific reactivated viruses, including Epstein-Barr virus and cytomegalovirus, were associated with increased mortality risk for critical patients. Furthermore, the study suggests a connection between viral reactivation and long COVID symptoms like fatigue and disability, particularly involving Anelloviridae. While the findings are significant, they do not establish causality, and further research is needed to understand the full implications for COVID-19 treatment and long COVID management.