Similar to baseline, the fraction of proliferating (Ki67+) cells for all four immune cell subpopulations (CD3+, CD4+, CD8+, Foxp3+) at day 15 was numerically higher in basal-like tumours, while luminal tumours showed the lowest fraction of proliferating cells, although the difference was not statistically significant (Table 1, Fig. 3c, Supplementary Fig. 16c). Here, FOXP3 is linked to neoplasm.