What is pneumonia?

Pneumonia is a medical condition where lung tissue becomes inflamed, usually caused by a virus or bacteria. Learn how shortness of breath, cough, and fever are common symptoms of this condition and why they occur in pneumonia. More free lessons at: 0:01 Overview of lung physiology 2:03 Fluid in the lungs impairs breathing 3:45 Signs and symptoms 4:58 Causes of pneumonia (bacteria, viruses, community acquired, ventilator acquired) 7:54 Aspiration pneumonia Pra