“…1,2 However, at present the occurrence of multiple cases emerges as an increasing trend. 3,4 In this study, from Apr 2010 to Mar 2012, the prevalence of human respiratory viruses every month was monitored for determining the aetiological role and epidemiological profile of every common respiratory virus among outpatients with acute respiratory tract infections (ARTIs) in Beijing. On the other hand, we put In order to include potential viral ARTIs and to exclude typical bacterial infections, patients enrolled in the study were selected by physicians according to the following criteria: with respiratory symptoms such as cough or wheezing, acute fever (body temperature ≥ 38 • C), and normal or low leukocyte count, with or without radiological pulmonary abnormalities.…”