Median MxA levels were significantly higher in viral (123.6 ng/ml; interquartile range [IQR], 56.4–189.6) than bacterial/fungal infections (15.9 ng/ml; IQR, 9.9–38.1; Bonferroni test p < 0.001) and controls (n = 158; 8.2 ng/mL; IQR, <5.0–16.4; Bonferroni test p < .001). This evidence concerns the gene MX1 and fungal infectious disease.