Using the same adoptive co-transfer method of WT and Crlf2-/- P14 cells (Figure 5A) that we used for influenza infection (Figure 4A), we found that virus-specific P14 CD8+ T cells expressed more TSLPR at day 8 after LCMV infection in all tissues analyzed (blood, lungs, lymph node, and spleen) (Figure 5B), analogous to what we observed after influenza infection in lungs, lymph node, spleen, and BAL fluid (Figure 1C). Here, CRLF2 is linked to influenza.