Pneumonia, a critical pulmonary infection, may affect people of any stages. It arises when the air sacs in one or both chest cavities become irritated and obstructed with pus. This state causes it difficult to ventilate and get adequate gas into the body. There are several kinds of pneumonia, ranging from mild cases to dangerous conditions, and it'

Pneumonia is a common pulmonary disease that affects the air sacs in your pulmonary system. It develops when these air sacs swell up, making it difficult to take in oxygen. Several types of bacteria, microorganisms and fungi can trigger pneumonia. Symptoms often present as a hacking cough, fever, feeling cold, difficulty breathing and chest pain.