Trends of respiratory viruses and factors associated with severe acute respiratory infection in patients presenting at a university hospital: a 6-year retrospective study across the COVID-19 pandemic

大学医院就诊患者中呼吸道病毒的流行趋势及与严重急性呼吸道感染相关的因素：一项跨越 COVID-19 大流行的 6 年回顾性研究