Chen J, Li X, Wang W, et al. - At the Fever Clinic of Peking University Third Hospital, researchers conducted a retrospective study involving outpatients with community-acquired pneumonia (CAP) in order to identify respiratory pathogens, including common pneumonia-causing bacteria, viruses, and atypical pneumonia pathogens in this population. This study was performed using reverse transcription-polymerase chain reaction. Among 232 enrolled outpatients, positive test results were identified in 153 patients (65.9%), of which 26.7% were viruses, 19.4% were atypical pathogens, and 19.8% were bacteria. Findings suggested that detection of viruses is common among outpatients with CAP, and the most common viruses are IFVs, especially during flu season. Risk for viral-bacterial coinfection was observed among patients with viral infection. The outpatients with CAP had Mycoplasma pneumoniae as the leading pathogen.