Effect of Albumin Administration in Hypoalbuminemic Hospitalized Patients With Community-acquired Pneumonia.

Inclusion Criteria: * Age ≥ 18 years. * Diagnosis of CAP (Chest radiography consistent with CAP AND the presence of ≥2 following prespecified clinical criteria: Fever or hypothermia; Cough; Purulent sputum; High white blood cell count; Dyspnea; Pleuritic chest pain; Signs consistent with pneumonia on chest auscultation) * Serum albumin concentration ≤ 30 g/L at presentation Exclusion Criteria: * Pregnancy or lactation * Immunosuppression (e.g. chemotherapy or radiotherapy within 90 days, immunosuppressive drugs, corticosteroids at a minimum dose of 15mg/day of prednisone within 2 weeks of enrolment, HIV with a CD4 count below 200, solid organ transplant recipients, hematopoietic cell transplant recipients). * Severe clinical status with expected survival of less than 24h. * Congestive heart failure (New York Heart Association classes 3 or 4) * Any contraindication for albumin administration such as hypersensitivity to albumin. * Clinical conditions in which there is another indication for albumin administration (e.g. hepatic cirrhosis with ascites, malabsorption syndrome and nephrotic syndrome). * Absence or impossibility of obtaining informed consent from the patient/next of kin. * Patient already included in another clinical trial testing a treatment method.