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季节性流感流行病的两个峰值 - 中国,2023年

Yiran Xie¹, Shuxia Lin¹, Xiaoxu Zeng¹

¹National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Disease, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.

China CDC weekly

|September 30, 2024

概括

中国在2023年经历了两次意想不到的流感高峰,主要菌株发生了变化. 加强监测对于管理不断变化的流感模式和综合病原体监测至关重要.

科学领域:

公共卫生公共卫生
病毒学病毒学
流行病学流行病学

背景情况:

流感会导致每年流行病和偶尔的流行病,这对公众健康构成重大挑战.
COVID-19大流行影响了包括流感在内的季节性呼吸道疾病的模式.

研究的目的:

检查2023日历年期间在中国发生的两个意想不到的流感峰值.
为了确定在这些高峰期间占主导地位的流感菌株及其地理分布.

主要方法:

从中国各地的指定监测医院收集了类似流感的疾病 (ILI) 数据.
实时逆转录聚合酶链反应 (rRT-PCR) 用于实验室确认阳性病例.
数据被提交给中国流感监测信息系统进行分析.

主要成果:

2023年出现了两种不同的流感高峰:春季流行病 (二月至三月) 和晚期流行病 (在49至50周达到峰值).
主导菌株从春季的A(H1N1) pdm09转移到后期的A(H3N2),B/维多利亚血统病毒的增加.
阳性率在春季达到60%以上,在后来的高峰期达到50%以上,北方和南方地区的地理差异不同.

结论:

中国的流感流行病模式正在恢复到COVID-19前的规范,但需要持续监测.
加强流感监测网络对于早期检测和反应至关重要.
这些发现支持对多种呼吸道病原体进行综合监测的进步.

关键词:

流行病流行病流行病季节性流感是季节性流感的一种.监控监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督

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