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en.wikipedia.org/wiki/T_helper_cell

T h 17 helper cells are a subset of T helper cells developmentally distinct from T h 1 and T h 2 lineages producing interleukin 17 (IL-17). T h cells produce IL-17 which is a pro inflammatory substance. This means it is especially good at fighting extracellular pathogens and fungi. THαβ helper cells. THαβ helper cells provide the host immunity against viruses.

www.ncbi.nlm.nih.gov/books/NBK26827

Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.

study.com/academy/lesson/helper-t-cells-definition-function-quiz.html

Helper T Cells Defined. Immunity is defined in physiology as the body's ability to resist infection and abnormal changes due to outside factors. This includes the body's ability to protect against ...

education.seattlepi.com/function-helper-tcells-body-4185.html

Helper T-cells in the body are immune cells that defend against infection. They are part of the adaptive immune system, which has the ability to learn about, adjust against and remember different types of infection. Helper T-cells, symbolized by the letters “Th,” come in four general categories, each with distinct ...

thelpercells.com

The T helper cells (Th cells) are a type of T cell that play an important role in the immune system, particularly in the adaptive immune system.

www.britannica.com/science/helper-T-cell

Stimulation of immune response by activated helper T cells. Activated by complex interaction with molecules on the surface of a macrophage or some other antigen-presenting cell, a helper T cell proliferates into two general subtypes, T H 1 and T H 2. These in turn stimulate the complex pathways of the cell-mediated immune response and the humoral immune response, respectively.

www.sharecare.com/health/immune-lymphatic-system-health/how-t-cells-function...

T cells come in many types with specific functions, including: Helper T cells direct the immune system. In a rather lengthy process, helper T cells release cytokines. Cytokines stimulate B cells to form plasma cells. Plasma cells form antibodies, which stimulate the production of two other types of T cells: cytotoxic T cells and suppressor T cells.

en.wikipedia.org/wiki/T_cell

T cells are grouped into a series of subsets based on their function. CD4 and CD8 T cells are selected in the thymus, but undergo further differentiation in the periphery to specialized cells which have different functions. T cell subsets were initially defined by function, but also have associated gene or protein expression patterns.

www.medicinenet.com/script/main/art.asp?articlekey=11306

T-helper cell: A type of T cell that provides help to other cells in the immune response by recognizing foreign antigens and secreting substances called cytokines that activate T and B cells. T-helper cells fall into two main classes: those that activate other T cells to achieve cellular inflammatory responses; and those that drive B cells to produce antibodies in the humoral immune response.

www.learner.org/courses/biology/textbook/hiv/hiv_3.html

The Central Role of Helper T Cells Helper T (T H) cells are critical to coordinating the activity of the immune response.The chemical messages they secrete stimulate the non-specific immune response to continue, and strengthen and boost appropriate specific responses.Helper T cells have sometimes been called the "conductors" of the immune system because they coordinate activity like the ...