In the CFS group, total lymphocyte count (2.472 × 109/L, 1.662–3.155), CD8+ T cells (0.394 × 109/L, 0.291–0.492), and NK cells (0.205 × 109/L, 0.151–0.259) were reduced (Figure 1, Table 2). Here, CD8A is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.