Viral load and CD4⁺ T-cell count in naturally SIV-infected SMs. (A) Viral load (SIV RNA copies/mL plasma) in 110 SIV-infected SMs included in this study. (B) CD4⁺ T-cell counts (cells/mm3) in the same 110 SIV-infected SMs. (C) Lack of correlation between CD4⁺ T-cell counts (cells/mm3) and viral load (SIV RNA copies/mL plasma) in the same cohort of 110 SIV-infected SMs. For panel C, P = ns indicates that the P value of the correlation coefficient was more than .05 (Spearman rank correlation test).