CD8A and influenza: Whilst the numbers were 5× higher than naïve A2/S269-277+CD8+ T cells detected in uninfected HLA-A*02:01+ donors, they were 10-fold lower when compared to frequencies of influenza-specific A2/M158+CD8+ and Epstein-Barr virus-specific A2/BMLF1280+CD8+ T cells.