A 37-year-old man presented with fever and productive cough for 3 days. He was febrile, hypoxic and physical examination showed focal decrease in air entry and coarse crepitations over the right lower chest. Laboratory investigations revealed leukocytosis and a CXR was performed. What is the most likely diagnosis ?
- Pneumonia
- Lung Abscess
- Empyema
- Pleural Effusion