Consistent with other reports [42], the CD8+ T cell response was low or undetectable in early stages (days 1–3 PFO; median ± IQR = 0.12 ± 0.24), and remained fairly stable thereafter, up to 100 days after viral infection (median ± IQR: 4–7 days PFO = 0.67 ± 4.53; 8–35 days PFO = 0.555 ± 1.778; 36–100 days PFO = 0.76 ± 1.97) (Figure 1c). The gene discussed is CD8A; the disease is viral infectious disease.