PRDM1 and viral infectious disease: Upon chronic viral infection, Blimp‐1 drives CD8 T‐cell exhaustion by directly repressing expression of the IL2rα chain and CD27·42, 43 Together with the transcription factor Hobit (homologue of Blimp‐1 in T‐cells), Blimp‐1 was shown to support the formation of tissue‐resident memory cells while suppressing circulating memory cells.44