What is pnuenomia?

Pneumonia is an infection that inflames the lungs. The air sacs (alveoli) fill with fluid or pus, causing cough with phlegm or pus, fever, chills, and difficulty breathing. Pneumonia can range in severity from mild to life-threatening. It is the leading cause of death from infectious disease worldwide.

Anyone can get pneumonia, but certain people are at higher risk, including:

- Young children

- Older adults

- People with weakened immune systems

- People with chronic health conditions, such as heart disease, diabetes, or lung disease

- People who smoke

- People who drink alcohol heavily

Pneumonia is usually caused by bacteria, such as Streptococcus pneumoniae (pneumococcus) or Mycoplasma pneumoniae. It can also be caused by viruses, such as the flu virus or respiratory syncytial virus (RSV).

Symptoms of pneumonia can include:

- Cough with phlegm or pus

- Fever

- Chills

- Difficulty breathing

- Chest pain

- Muscle aches

- Fatigue

- Loss of appetite

If you have symptoms of pneumonia, see your doctor right away. Pneumonia can be treated with antibiotics and other medications. In severe cases, hospitalization may be necessary.

Preventing pneumonia is important. There are several things you can do to reduce your risk, including:

- Get vaccinated against pneumococcus and the flu.

- Practice good hygiene, such as washing your hands frequently and avoiding contact with people who are sick.

- Avoid smoking.

- Eat a healthy diet and exercise regularly to strengthen your immune system.

If you have a chronic health condition, such as heart disease, diabetes, or lung disease, talk to your doctor about ways to reduce your risk of pneumonia.