HLA-A and infection: Here, utilizing direct ex vivo tetramer staining and human scTCRαβ multiplex RT-PCR16,17, we show the first longitudinal dissection of TCRαβ repertoires for immunodominant A2+M158+CD8+ T cells15,18 in PBMCs from three HLA-A*02:01-expressing patients (Fig. 3a; a9, a10, and a79) who survived H7N9 infection, as none of the patients with the fatal disease outcomes expressed HLA-A*02:01.