The annual seasonal epidemic of influenza caused serious disease burden around the world, and serious social panic and economic losses. Due to the high variability and uncertainty of influenza virus, prevention and control of influenza faces many challenges. Surveillance is a key strategy to prevent and control influenza, and influenza is the first infectious disease to be monitored globally. More than 60 years, influenza surveillance programs in China has made great contributions to the prevention and control of influenza in China and the world. Especially in the past 10 years, the influenza surveillance network has developed rapidly, the scale has been expanded significantly, the monitoring content and scope have been continuously improved, and the monitoring quality has been rapidly improved. The China Influenza Surveillance Network is one of the early detection systems for emerging infectious diseases in China and the world. It helps to improve the capacity of public health system in prevention and control and early warning of emerging infectious diseases.
流感引起的每年季节性流行在全球造成严重的疾病负担，而且流感还会不定期引起世界性流感大流行，造成严重社会恐慌、经济损失。由于流感病毒的高度可变性和不可确定性，流感防控面临诸多挑战。监测是预防和控制流感的关键策略，流感也是第一个实行全球监测的传染病。中国流感监测60余年，为我国和全球流感防控做出了巨大贡献。特别是近10余年来，流感监测网络得以飞跃发展，规模显著扩大，监测内容和范围不断完善，监测质量迅速提升。中国流感监测网络是我国和全球新发传染病病原的早期发现体系之一，为新发突发传染病应对准备了技术和人才队伍，有助于全面提升公共卫生系统对新发传染病的防控和预测预警能力。.
Keywords: Avian influenza virus; Influenza virus; Pandemic; Surveillance; Surveillance network.