Figure 6

Scatter plot comparisons of log-transformed values of fold-changes (Day 21 versus Day 0) of HI titres and frequencies of CD4 ⁺ T cells expressing at least two immune markers specific for the three vaccine strains, in samples from all three groups of the Per Protocol cohort (N = 120, 120 and 118; upper, middle and lower graphs, respectively). Pearson correlation coefficients (r) and related trend line are shown for each comparison.