NK cell deficiency syndromes: Clinical manifestations and ... - UpToDate
https://www.uptodate.com/contents/nk-cell-deficiency-syndromes-clinical-manifestations-and-diagnosis
WEBSep 30, 2022 · INTRODUCTION. Natural killer (NK) cells are innate lymphocytes that are critical in defense against virally infected cells and in tumor surveillance [ 1-4 ]. These cells are considered part of the innate immune system because they do not require previous exposure to foreign, pathogenic, or dangerous antigens to act.
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