The following mAb were purchased from eBioscience or Biolegend and used in an appropriate combination of fluorochromes: CD8 (clone 53-6.7; eBioscience), PD-1 (clone J43; eBioscience), LAG-3 (clone eBioC9B7W; eBioscience), 2B4 (clone eBio244F4; eBioscience), CD11a (clone M17/4; eBioscience), Thy1.1 (clone HIS51; eBioscience), IFNγ (clone XMG1.2; Biolegend) and TNFα (clone MP6-XT22; Biolegend). All LCMV-specific peptides were synthesized by Bio-Synthesis Inc (Bio-Synthesis, Louisville, TX): GP276-286 (SGVENPGGYCL) and GP33-41 (KAVYNFATM) (52 (link)). p:MHC class I tetramer H-2Db GP276 and GP33 were made and used as previously described (25 (link), 48 (link)).