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, https://amberjfti579275.theblogfairy.com/32450388/understanding-pneumonia-a-guide-to-causes-symptoms-and-treatment