Pneumonia is an infection where the tiny air sacs in your lungs (alveoli) become inflamed. This can lead to symptoms such as cough and shortness of breath. Pneumonia can be serious for some groups, ...

Pneumonia is a type of lung infection. It can infect one or both of the lungs. It happens when air sacs in the lungs fill up with bacteria or pus. Different types of bacteria can cause pneumonia. The ...