For T-cells we have terms and definitions in 3 topics. The topics are Hepatitis B, Human Body and Sexually Transmitted Diseases.

A type of white blood cells that are involved in rejecting foreign tissue, regulating immunity, and controlling the production of antibodies to fight infection.
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lymphocytes that develop in the thymus.
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Special kind of white blood cells that are part of the immune system. They help kill germs in the body. Doctors can count a person's T-CELLS. Most healthy adults have about 1000 of them. If someone has HIV and a T-CELL count lower than 200 a doctor can tell the person they have AIDS. Counting T-CELLS is a way doctors try and measure how the immune system is working. T-CELLS can go up and down. They do not tell a person how they are feeling or when they will die. People can have a low number and still feel perfectly healthy.
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