Naive T cells are a type of white blood cell that play a crucial role in the immune system. They originate from bone marrow and mature in the thymus, where they learn to recognize specific antigens. These cells remain in a resting state until they encounter their corresponding antigen, which activates them to respond to infections. Once activated, naive T cells can differentiate into various subtypes, such as helper T cells or cytotoxic T cells, each with specific functions. They help coordinate the immune response or directly kill infected cells. Naive T cells are essential for developing long-term immunity and memory against pathogens.