Finally, multiplex immunofluorescence was performed to determine the infiltration of PD1hi CD200hi CD4 exhausted T cells in bladder cancer tissue, which showed that PD1hi CD200hi CD4 exhausted T cells were commonly present in the tumour‐infiltrating CD4+ T cells in the bladder cancer tissues (Figure 1J). The gene discussed is CD4; the disease is urinary bladder carcinoma.