T cell aging is a research area that focuses on understanding how the immune system's T cells change and decline with age. The aging process can lead to alterations in the function and effectiveness of T cells, which play a crucial role in identifying and destroying harmful pathogens in the body. Research in this area aims to uncover the mechanisms behind these age-related changes in T cells, as well as develop strategies to maintain or restore their function in older individuals. This research is important for improving our understanding of age-related immune dysfunction and developing new approaches for promoting healthy aging and enhancing immunity in elderly populations.