In addition, gene expression in KLRG1hi cells at day 5 after lymphocytic choriomeningitis virus (LCMV) infection is substantially different than in canonical TE CD8 T cells on day 8 after infection26,27, and gene expression profiles in single activated CD8 T cells 4 days afterListeria infection are distinct from those in single cells on day 1 after infection as well as those in single cells at the peak response on day 7 and in the memory phase23. Here, CD8A is linked to infection.