Pneumonia is a common respiratory infection that inflames the alveoli in one or both lungs. These areas may fill with pus, causing coughing. Many bacteria, viruses, and fungi can cause pneumonia. Symptoms differ depending on the origin of the infection and the person's overall health. Common sympto

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, breathing problems, and sharp pains in the chest. Pneumonia can be caused by a variet