Pneumonia is a type of lung infection that can result in symptoms like chest pain when breathing, a cough that produces yellow or green phlegm, or a fever greater than 100.5ºF. It is more common in men than women, and it occurs more frequently in people who smoke than people who do not. A number of different germs (such as viruses, bacteria, or fungi) can cause this condition -- viruses are thought to cause more cases than bacteria.
Most of the time, people can be treated at home with rest, fluids, and medication for fever and pain relief. When the illness is caused by bacteria, a healthcare provider may prescribe antibiotics. Cases that are more severe may call for treatment in the hospital.
(To learn more about this lung condition, click Pneumonia. This article discusses how pneumonia is spread, how long it lasts, and why it may occur in some people but not in others. You can also click any of the links in the box to the right for specific information.)