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 final of five special episodes from the meeting, where Brenda and Jason talk about sessions including the dysfunction of exhaustive T cells enforced by MCT11-mediated lactate metabolism and extrafollicular differentiated B cells, presented by former podcast guest Dr. Frances Lund.