MMP-9 levels (Median, IQR ng/mL, n) for the sepsis group on day 1 (5.3, 1.8–38.7, 13), day 2 (12.4, 0.7–15.7, 11), and day 3 (6.4, 0.9–16.9, 22) were lower than febrile (61, 24.7–90.9, 28) and healthy controls (41.8, 27.4–76.0, 29); (p< 0.05 for days 1, 2, and 3). Here, MMP9 is linked to Sepsis.