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  1. Pneumonia - Symptoms and causes - Mayo Clinic

    Jun 13, 2020 · Pneumonia is an infection that inflames the air sacs in one or both lungs. The air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, …

  2. Pneumonia: Causes, Symptoms, Diagnosis & Treatment

    Pneumonia is a lung infection caused by bacteria, viruses or fungi. Fluid and inflammation in your lungs makes breathing hard and causes fever and other symptoms.

  3. Pneumonia - Wikipedia

    Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli. [3][13] Symptoms typically include some combination of productive or dry cough, chest …

  4. Pneumonia: Symptoms, Causes, and Treatment - Harvard Health

    Jun 24, 2024 · Pneumonia is an infection of the lungs that can make it hard for the oxygen you breathe to get into your bloodstream. Most cases of pneumonia are caused by bacteria or …

  5. Pneumonia: Diagnosis, Symptoms, and Treatment - Healthline

    Jun 24, 2024 · Pneumonia is an infection of the lungs caused by fungi, bacteria, or viruses. General symptoms include chest pain, fever, cough, and trouble breathing.

  6. Pneumonia | Pneumonia | CDC

    Homepage for CDC's information on pneumonia, an infection of the lungs.

  7. Pneumonia - Johns Hopkins Medicine

    Pneumonia is an infection of one or both of the lungs caused by bacteria, viruses, fungi, or chemical irritants. It is a serious infection or inflammation in which the air sacs fill with pus and …

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

    Mar 24, 2022 · Pneumonia is a lung infection that causes your air sacs to fill up with fluid or pus. Learn about the causes, risk factors, signs and symptoms, and treatment for pneumonia.

  9. Pneumonia: Symptoms, Causes, and Treatment - WebMD

    Nov 14, 2024 · Pneumonia is the infection and inflammation of air sacs in your lungs. These air sacs, called alveoli, can fill with fluid or pus, causing a serious cough and fever.

  10. Pneumonia: Symptoms, Causes and Treatment | US News

    Nov 25, 2024 · Pneumonia is a lung infection that can be caused by bacteria, viruses or fungi, resulting in coughing, fever and shortness of breath.