Community-acquired pneumonia.

INTRODUCTION: In the northern hemisphere about 12/1000 people a year (on average) contract pneumonia while living in the community, with most cases caused by Streptococcus pneumoniae. Mortality ranges from about 5-35% depending on severity of disease, with a worse prognosis in older people, men, and people with chronic diseases. METHODS AND OUTCOMES: We conducted a systematic review and aimed to answer the following clinical questions: What are …