IFNB1 and infection: No statistically significant difference in blood IFNβ levels was noted among the viral infection group (<1.2 to 4.24 pg/mL (median = 1.2 pg/mL)), bacterial infection group (<1.2 to 7.30 pg/mL (median = 1.2 pg/mL)), and non-infection group (<1.2 to 2.20 pg/mL (median = 1.2 pg/mL)).