CD4 and Epstein-Barr virus infection: At the time of this diagnosis, IgG was 1,264 mg/dL, absolute CD4 was 360 cells/uL (CD4%: 17%), and no other co-infections were diagnosed, including Epstein-Barr virus (EBV) infections (EBV-encoded RNA (EBER)-negative on a tissue biopsy).