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  1. Pneumonia - Symptoms and causes - Mayo Clinic

    Jun 13, 2020 · Pneumonia — Learn about the symptoms, causes and treatment of this serious lung infection.

  2. Pneumonia - Diagnosis and treatment - Mayo Clinic

    Jun 13, 2020 · Pneumonia — Learn about the symptoms, causes and treatment of this serious lung infection.

  3. Infectious Diseases A–Z: What you need to know about pneumonia

    Dec 30, 2019 · Pneumonia is an infection that inflames the air sacs in one or both lungs, and can range in seriousness from mild to life-threatening. Pneumonia can affect anyone, but the age groups at …

  4. Walking pneumonia: What does it mean? - Mayo Clinic

    Feb 8, 2023 · Walking pneumonia is a mild bacterial infection that resembles a cold. It usually does not require bed rest or a hospital stay.

  5. Consumer Health: Recognizing the signs of pneumonia

    Nov 10, 2023 · Pneumonia is an infection that inflames the air sacs in one or both lungs. The air sacs may fill with fluid or pus, causing cough with phlegm or pus, fever, chills, and difficulty breathing. …

  6. Pneumonitis - Symptoms and causes - Mayo Clinic

    Jul 30, 2024 · Lung infections such as pneumonia also can cause lung tissue to become inflamed. But pneumonitis generally refers to inflamed lung tissue not caused by an infection. Pneumonitis is a …

  7. Pneumonia and your lungs - Mayo Clinic

    Most pneumonia occurs when a breakdown in your body's natural defenses allows germs to invade and multiply within your lungs. To destroy the attacking organisms, white blood cells rapidly accumulate.

  8. Legionnaires' disease - Symptoms & causes - Mayo Clinic

    Dec 22, 2025 · Bacteria that can live in water from air conditioning systems, showers and spas cause this severe form of pneumonia.

  9. Pneumococcal Pneumonia - Mayo Clinic Press

    Nov 4, 2022 · This page tells you all you need to know about the symptoms, treatment and prevention of pneumococcal pneumonia. Access the Mayo Clinic Vaccine Planner to help you identify vaccines …

  10. Human metapneumovirus (HMPV): Symptoms and prevention

    Feb 19, 2025 · An HMPV infection can make you feel like you have a cold. It may cause illnesses such as croup or pneumonia. Most people get better quickly. But for some, HMPV can cause serious …