Natural killar cells (NK Cells)
NK cells are type of Lymphocytes and component of innate immune system.
They target tumor cells and protect against a wide variety of infectious microbes.
NK cells are already specialized to kill certain type of target cells, especially
1. Host cells that have become infected with virus.
2. Host cells that have become cancerous.
They are identified with natural or innate immunity, they bring about direct killing of microorganisms or Lysis of foreign material or body.
They do not need to recognize specific antigen before into action.
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