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.
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Co-infection cases of human common respiratory viruses in Beijing, 2010-2012.
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