<正>Lymphocyte migration is essential for adaptive immune surveillance. However, our current understanding of this process is rudimentary, because most human studies have been restricted to immunological analyses of blood and various tissues. To address this knowledge gap, we used an integrated approach to characterize tissue-emigrant lineages in thoracic duct lymph(TDL). The most prevalent immune cells in human and non-human primate efferent lymph were T cells. Cytolytic CD8+T cell