Not exactly: this review found that one immune cell family has clearer groups in mice than in humans. The 2026 review in *Trends in Immunology* examined existing findings on MAIT cells. These are immune cells that detect substances made by microbes. They belong to the broader lymphocyte family. The review compared findings from mice with findings from humans. It was not a study testing a health habit or treatment. In mice, researchers use cell features to distinguish two groups: type 1 and type 3. But these features are not fixed. Inflammation can change them, making the cells harder to sort into neat groups. In humans, the same two groups are less clear. Some differences may reflect how cells are responding, rather than separate cell types. Still, distinct groups of human MAIT cells exist in different body tissues. The review aims to help researchers agree on how to group these cells. For members tracking Lymphocytes %, this is context, not a new target. Your result shows the share of your white blood cells that are lymphocytes. It does not describe the detailed cell features examined here. The source gives no percentage changes or evidence that a particular habit changes this result. When comparing bloodwork with the community, that distinction matters. Your own numbers can show changes over time. This review cannot explain why those changes happened or what your MAIT cells were doing. What patterns have you noticed in your Lymphocytes % across blood tests?