KEGG pathway enrichment analysis of this gene cluster showed that FCGR3A was mainly enriched in Staphylococcus aureus infection process; CCR7 was mainly enriched in cytokine-cytokine receptor interaction; CD28 was mainly enriched in Hematopoietic cell lineage, T cell receptor signaling pathway, cell adhesion molecules and primary immunodeficiency process (Figure 1B). Here, CD28 is linked to staphylococcus aureus infection.