CD8A and autoimmune disease: The Gini VIM method determined that clinical parameters such as lethargy, pleuritic chest pain, dermatological injuries, treatment with corticosteroids, immune factors (such as enhanced total levels of NK cells, CD8+ T lymphocytes, and Tregs), and increased cytotoxic activity were the most important variables to assign the individuals to the Long-COVID group (Figure 6C), whereas demographic parameters such as female gender and O+ blood type, or previous history of autoimmune disease, were within the variables with less importance.