CD4 and infection: The negative correlations between the number of CTL escapes in pol and lower CD4/CD8 ratio were confirmed also when only the recent infections were analysed (1.02 ± 0.18 for 0 CTL escapes vs. 0.74 ± 0.06 for ≥3 CTL escapes, ρ = −0.15, P = 0.067) (Table 6).