White blood cells are an important part of your body ... Some people may feel moderate pain and a stinging sensation during the blood draw, and some people may feel sick or lightheaded during ...

One will draw blood, while the other line will return ... Step Two: Turning your T cells into cancer killers The white blood cells are taken to a laboratory once they have been collected.

A T cell count is a blood test that measures the number of T cells in your body. T cells are a type of white blood cell called lymphocytes. These cells fight off diseases. The two categories of ...