ALB and clostridium difficile infection: While extensive research has delineated the prognostic significance of inflammatory biomarkers in COVID-19, such as the CRP-to-Albumin Ratio (CAR), neutrophil-to-lymphocyte ratio (NLR), and Prognostic Nutritional Index (PNI), their prognostic utility in the context of dual infection with CDI remains underexplored [19,20,21].