Summary:

- The article discusses a study that has identified a novel immune cell type called "tissue-resident memory T cells" (TRM cells) that play a crucial role in the body's response to infection and cancer.
- TRM cells are found in various tissues, including the skin, lungs, and intestines, and they are able to mount a rapid and localized immune response to pathogens or tumor cells.
- The study provides insights into the biology and function of TRM cells, which could lead to the development of new immunotherapies and strategies for enhancing the body's natural defenses against diseases.