Community acquired pneumonia 上 epidemiology 1. Annual cost: 9.7 billion 2. 4 million adults 3. 20%-hospitalization 8-15/1000 person/ per year Aged patients, winter time o Independent risk factors Alcoholism A sthma immunosuppression 4. age 5. Cigarette smoking Epidemiology 1. Annual cost: 9.7 billion 2. 4 million adults 3. 20%-hospitalization 4. 8-15/1000 person/per year 5. Aged patients, winter time  Independent risk factors 1. Alcoholism 2. Asthma 3. Immunosuppression 4. age 5. Cigarette smoking