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  1. Pneumonia - Symptoms and causes - Mayo Clinic

  2. Pneumonia: Symptoms, Causes, Diagnosis, Treatment, and

  3. Pneumonia: Causes, Symptoms, Diagnosis & Treatment

  4. Pneumonia: Symptoms, Causes, Treatment, and More - Healthline

  5. Pneumonia - Diagnosis and treatment - Mayo Clinic

  6. Pneumonia | CDC - Centers for Disease Control and Prevention

  7. Pneumonia | Johns Hopkins Medicine

  8. Pneumonia - Wikipedia

  9. Pneumonia - What Is Pneumonia? | NHLBI, NIH

  10. Pneumonia Symptoms and Diagnosis | American Lung Association