Distribution of the atypical pathogens of community-acquired pneumonia to disease severity

Community-acquired pneumonia (CAP) is a major cause of hospitalization and death worldwide. Its annual incidence ranges from 2.7–10 per 1,000 persons in European countries (1), 2.67–12 per 1,000 persons in the US (2,3) and 3.4–42.9 per 1,000 persons in Japan (2,3)