Data published in the Lancet’s EBioMedicine shows that the pathogenic envelope protein of the human endogenous retrovirus W (HERV-W ENV) is found on lymphocytes of hospitalized patients with COVID-19, and that its level of expression is associated with disease severity.
https://geneuro.ch/data/news/GeNeuro-HERV-and-Covid-ENG-April-15-2021.pdf