In this study, 14 patients with CAEBV (aged 18-64 years; five males, nine females; CD4 type: n = 4; CD8 type: n = 4; CD56 type: n = 3; CD4 and CD56 double infection: n = 2; and CD4 and CD8 double infection: n = 1) were investigated. The gene discussed is CD4; the disease is infection.