CD4 and HIV infectious disease: However, the median CD4 count of CRF55_01B-infected MSM was not significantly different from that of CRF01_AE-infected MSM at diagnosis of HIV infection (349.5 [IQR: 250.2–474.8] vs. 335.0 [IQR: 237.0–464.0], P = 0.352) and at initiation of cART (224.0 [IQR, 165.2–283.0] vs. 203.0 [IQR, 130.5–287.0], P = 0.154).