CD4 and infection: The TN compartment contained a median of 3.4 log copies/million cells [3.0–3.9], even though its infection level was one tenth that of all resting memory CD4 subsets (p = 0.0005), which contained equivalent levels of HIV-DNA (medians: TCM: 4.5 [4.1–5.0], TTM: 4.7 [4.5–5.2], and TEM: 4.6 [4.3–4.9] log copies/million cells).