Pneumonia is an infection which causes the air sacs in the lungs to become inflamed and on occasion to fill with fluid. As a result, patients experience difficulty breathing and blood oxygen levels drop. Although pneumonia is most commonly caused by bacteria, the condition can, in fact, be induced by more than 30 different organisms, including fungi, parasites, and viruses. Irrespective of the underlying cause, pneumonia in elderly people represents a greater challenge than it does to any other age group. It is strongly recommended to call a physician or book an online appointment for proper treatment before the pneumonia in elderly gets more complicated.