摘要 : Dear Sir, An earlier report has suggested the existence of an epidemiological interference in the development of outbreaks between norovirus, influenza A and B virus and respiratory syncytial virus (RSV) as these virus outbreaks u... 展开 Dear Sir, An earlier report has suggested the existence of an epidemiological interference in the development of outbreaks between norovirus, influenza A and B virus and respiratory syncytial virus (RSV) as these virus outbreaks usually did not reach their epidemiological peaks during the same period [1]. This assumption was based on data from Norwegian laboratory reports of virus infections [2]. The observation period was 4 winter seasons, from July 2002 to June 2006. In this communication we have extended the observation period to June 2008, thus including 6 winter seasons. 收起