In line with these observations, adoptive transfer of GFI1hi and GFI1lo CD8+ T cells isolated from spleen of Gfi1tdTomato/+ mice infected with LCMVc13 at day 7 after infection into infection-matched recipients (Extended Data Fig. 3f) showed that GFI1hiCD8+ T cells had more enhanced capacity to proliferate than GFI1lo CD8+ T cells (Fig. 2h). This evidence concerns the gene CD8A and infection.