In May 2024, we attended IMMUNOLOGY2024™, the annual meeting of the American Association of Immunologists in Chicago, and recorded daily episodes discussing highlights of the previous 24 hours. Here is the fourth of five special episodes from the meeting, where Brenda and Jason highlight discussions on tumor-infiltrating lymphocyte therapy, chaired by former podcast guest Dr. Kristin Anderson, as well as fueling T cell fate decision during infection with an initial focus on immunometabolism.