Pneumonia is a type of lung infection that can be caused by a number of different germs, such as bacteria, viruses, or fungi. This contagious illness is characterized by symptoms such as a cough with yellow or green phlegm, fever, chills, and trouble breathing, among others. Depending on the cause of the condition and other factors, a person's symptoms can range from mild to severe. If you are at risk for pneumonia, there are things you can do to help prevent it, such as getting vaccinated.
It usually takes three to five days before a person with pneumonia starts to feel better. Still, it may take three weeks or more before a person feels well enough to go back to his or her normal routines. A mild cough and fatigue can last for a month or more.
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