Subsequently, APIQGTNLL, KPRTSTPVTEF, IPNARANL (HLA-B*07:02 restricted epitopes), and YSDPNNHEVY and VTDSNLIY (HLA-A*01:01 restricted epitopes) were selected for custom-made (p:HLA) dextramer synthesis to investigate the ex vivo occurrence of CD8+ T cells against these epitopes in mumps patients. Here, HLA-B is linked to mumps infectious disease.