CRP and Pleural effusion: Chest X-ray and lung ultrasound demonstrated a left-sided moderate pleural effusion with underlying collapse-consolidation, along with a right-sided minimal pleural effusion and consolidation. Laboratory investigations showed a normal total leukocyte count (TLC) of 5,220 cells/mm3, C-reactive protein (CRP) of 205 mg/L, and procalcitonin of 0.302 ng/mL. Table 1 shows Laboratory and ABG Investigations at ICU admission.