Lower respiratory infections
A lower respiratory infection is an infection in your airways and lungs. It can be due to:
- influenza, or the flu
- pneumonia
- bronchitis
- tuberculosis
Viruses usually cause lower respiratory infections. They can also be caused by bacteria.
Coughing is the main symptom of a lower respiratory infection.
You may also feel breathlessness, wheezing, and a tight feeling in your chest.
Untreated lower respiratory infections can lead to breathing failure and death.

Impact of lower respiratory infections around the world