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Tuesday January 6, 2009
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The Immune System / The Immune System in Action
Page: 5
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Upon binding with each other, the macrophage and helper T cell release chemicals that send special immune cells into action. These chemicals stimulate the production of helper T cells and macrophages. They also stimulate the production another type of T cell: the killer T cell.
By now, many viruses have invaded the body's cells. The job of the killer T cells is to search out, attack, and destroy those cells already infected with the virus. |
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