KLRD1-expressing natural killer cells predict influenza susceptibility We identified KLRD1-expressing NK cells as a potential biomarker for influenza susceptibility. Expression of KLRD1 was inversely correlated with symptom severity. Our results support a model where an early response by KLRD1-expressing NK cells may control influenza infection. The NK cells are natural killer cells that help to control viral latency This was reported as: Scientists discover biomarker for flu susceptibility  “We found that a type of immune cell called a natural killer…