A study recently published in Nature examined COVID-19 and chronic virus reactivation. While the infection has been proven to reactivate Epstein–Barr virus and cytomegalovirus, much remains unknown about viral reactivation in COVID-19.

More than 1,150 hospitalized COVID-19 patients participated in the study. Key findings:

• Many patients experienced reactivation of Herpesviridae and Anelloviridae during acute COVID-19.

o   Distinct temporal dynamics were observed for different viruses.

o   Virus reactivation impacts disease severity, host immune effects, and clinical outcomes.

• No causation between virus reactivation and clinical outcomes was established by the researchers.
• Immunocompetent individuals also experienced virus reactivation.
• Anelloviridae and long COVID were found to be connected.

The researchers hope their findings can be used for future prediction and treatment strategies.