Pneumonia is a common lung infection that inflames the alveoli in one or both lungs. These sacs may fill with mucus, causing coughing. Many bacteria, viruses, and fungi can cause pneumonia. Symptoms change depending on the source of the infection and a patient's overall health. Common symptoms encompass fever, chills, fatigue, shortness of breath,

Pneumonia is a/happens to be/presents as an infection that inflames the air sacs in one or both lungs. These air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, shortness of breath, and aches in your chest. Pneumonia can be caused by a variety of organisms, including bacteria, viruses, and fungi