Pneumonia

Pneumonia is an infection that affects one or both lungs. It causes the air sacs, or alveoli, of the lungs to fill up with fluid or pus. Bacteria, viruses, or fungi may cause pneumonia.

What is the main cause of pneumonia?

Pneumonia is mostly spread when people infected cough, sneeze or talk, sending respiratory droplets into the air. These droplets can then be inhaled by close contacts. Less often, you can get pneumonia from touching an object or surface that has the germ on it and then touching your nose or mouth.