Figure 2. Coreceptor abundance stratified by HIV disease stage and clade.

The mean absolute number of CD4⁺/CCR5⁺ and CD4⁺/CXCR4⁺ T-cells (A) and mean density of CCR5 and CXCR4 on CD4⁺ cells (B) are shown, with error bars representing standard error of the means. Results are shown for samples from participants at early (black and heavy shading bars) or late (light shading and white bars) stages of infection and for participants infected with HIV-1 clade A (black and light shading bars) or D (heaving shading or white bars). *  =  p<0.05 and **  =  p<0.0001, calculated using unpaired t-test.