ESR1 and Sepsis: Sensitivity (Sn) and specificity (Sp), as well as area under curve (AUC), were low for both WBC (Sn = 47%, Sp = 72%, AUC = 0.547, 95%CI = 0.451–0.641, cut-off value 18 × 103/mm3, p = 0.446) and ESR (Sn = 50%, Sp = 62%, AUC = 0.529, 95%CI = 0.433–0.623, cut-off value 42 mm/h, p = 0.625), which confirms they are unreliable markers of sepsis severity.