Total viral DNA, integrated proviral DNA, viral mRNA, and plasma viral loads for HIV-1-infected and HIV-2-infected subjects. Units refer to copies per 106 PBMCs (total viral DNA and integrated proviral DNA), copies per 105 copies beta-actin (viral mRNA), and viral load per milliliter of plasma (plasma viral load). Unadjusted P values refer to Wilcoxon rank sum two-sided P values. Adjusted P values refer to robust regression P values adjusted for CD4+ T-cell count and age. Differences between HIV-1 and HIV-2 that reach statistical significance are in bold.