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Oncology

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Pneumonia 

Last Updated: November 19, 2025

3 min read Background  Pneumonia is an acute infection of the lung parenchyma characterized by inflammation of the alveoli and/or interstitium, resulting in consolidation, impaired gas exchange, and respiratory symptoms. It can be caused by bacteria, viruses, fungi, or parasites. Pneumonia presents clinically with cough, fever, dyspnea, and abnormal lung sounds and is a leading...