Box plots of clinical laboratory results and serum inflammatory biomarkers. White blood cell count (A), C-reactive protein (B), ferritin (C), and fibrin D-dimers (D) in the entire cohort (n = 95), split into blood groups O/B and A/AB. Markers of liver and kidney dysfunction, including AST (E), ALT (F), bilirubin (G), and peak creatinine (H) in the entire cohort (n = 95), split into blood groups O/B and A/AB. Inflammatory biomarker levels, including IL-6 (I), IL-10 (J), IL-1β (K), and TNF-α (L), in a substudy (n = 25) of patients. *Statistically significant P value for a difference between groups.