Pneumonia is a transmission of the lungs that is induced by viruses, 
bacteria, parasites or fungi. The disease is characterized by the inflammation of the alveoli that are found in the lungs or in some cases the alveoli are filled with fluids. The alveoli are the microscopic sacs in the lungs whose main duty is to absorb oxygen. In some cases serious conditions of pneumonia can lead to severe illness or even cause death.