Natural Killer Cells

Natural Killer Cells are a type of cytotoxic lymphocyte critical to the innate immune system. The role NK cellsMHC play is analogous to that of cytotoxic T cells. NK cells are unique; however, as they have the ability to recognize stressed cells in the absence of antibodies and MHC, allowing for much faster immune reaction.

https://www.youtube.com/watch?v=HN2058stdx8