Pearson correlation analysis showed that cluster 0, cluster 6, and cluster 5 scores were negatively correlated with different immune cell infiltrations, such as B cells, TIL, CD8+ T cells, Th1 cells, Th2 cells, Tfh cells, NK cells, and DCs, in the claudin-low subtype of breast cancer (Figure S11A). The gene discussed is CD8A; the disease is breast carcinoma.