CD4 and infection: In contrast, V5 length decreased with increasing time after infection (β = −0.07, p<0.001), was decreased in stage 4 (β = −0.69, p = 0.01 compared to stage 1), and was decreased in those with CD4 counts below 200 cells/ml (β = −0.66, p = 0.002) compared to those with CD4 counts above 500 cells/ml.