NK cell activity testing evaluates the function of natural killer cells, a key component of the innate immune system responsible for detecting and destroying infected or abnormal cells. By measuring cytotoxic activity, this test provides insight into immune strength, infection resistance, and potential vulnerability to chronic illness, helping guide personalized wellness, preventive m... https://www.yonseiclinicseoul.com/specialties/preventive-medicine-4/services/nk-cell-activity-testing