CD40LG and Kawasaki disease: The diagnostic efficacy of CD3+, CD8+, CD16 + CD56+, IgA, and IgM was evaluated using ROC curves: AUC values for the ROC curves for CD3+, CD8+, CD16 + CD56+, IgA, and IgM in diagnosing Kawasaki disease were 0.816, 0.887, 0.765, 0.723, and 0.715, respectively, all of which are greater than 0.5, indicating good diagnostic potential.