CD34 and infection: Figure 2B shows percentages of p24+ cells in the whole cells. These ranged from 0.1 to 1.7% of the total cocultured human cells. Viral replication was further confirmed by measuring supernatant HIV-1 p24 concentrations by ELISA (Figure 2C). A correlation was found between intracellular HIV-1 p24+ cell counts and supernatant HIV-1 p24 concentrations (Figure 2D). For those infected samples detecting p24+CD34+ cells (n = 12), the p24 MFIs of p24+CD34− and p24+CD34+ cells were not significantly different at any time from week 1 to week 5 post infection (Figure 2E).