T cell biology refers to the study of T lymphocytes, a type of white blood cell that plays a crucial role in the immune system. T cells are responsible for recognizing and attacking infected or abnormal cells, as well as coordinating immune responses. Research in T cell biology aims to understand the development, activation, and function of T cells, as well as how they contribute to immune responses in health and disease. This field of research is important for developing new strategies for treating diseases such as cancer, autoimmune disorders, and infectious diseases.