http://www3.niaid.nih.gov/healthscience/healthtopics/pneumonia/default.htm
National Institute of Allergy and Infectious Diseases, National Institutes of Health
Pneumonia is a lung disease. Pneumococcal pneumonia can infect the upper respiratory tract and can spread to the blood, lungs, middle ear, or nervous system. This site provides all the information related to this topic including the cause, transmission, symptoms, diagnosis, treatment, prevention, complications, research, and other links of information.