Fig. 2.

Activation of NK cells in dengue infected patients’ PBMCs ex vivo.

(A) Representative's plots of CD69 expression on NK cell subpopulations of acute and 2-month convalescent samples. (B) The frequencies of CD69⁺CD56⁺ cells (left), CD69⁺CD56^bright cells (middle) and CD69⁺CD56^dim NK cells (right). The frequencies of NK cells that express CD69, an activation marker, were determined. Data are shown as scattered plots of acute and 2-month convalescent samples from DF and DHF patients. Horizontal bars indicate the mean and error bars indicate standard deviation (SD). Differences between acute and convalescent samples were determined using Wilcoxon signed rank test. Differences between DF and DHF samples were determined using Mann-Whitney U test. Asterisks indicate P-values: *P<0.05, **P<0.01, ***P<0.001, ****P < 0.0001. “ns.” indicates a non-statistically significant.