HERV-W ENV antigenemia and correlation of increased anti-SARS-CoV-2 immunoglobulin levels with post-COVID-19 symptoms.
Giménez-Orenga, Karen, Pierquin, Justine, Brunel, Joanna et al.·Frontiers in immunology·2022
This study found that a dormant virus-like element called HERV-W, which exists naturally in our DNA, may reactivate and remain active long after COVID-19 infection has cleared in people with long COVID. The researchers also discovered that people with higher levels of certain immune proteins (antibodies) against SARS-CoV-2, especially IgE antibodies, tended to have worse physical function. These findings suggest that HERV-W activation and lingering antibody responses might help explain why some people develop long-lasting COVID symptoms.