Spatial and temporal distribution characteristics of seasonal A(H3N2) influenza in China, 2014-2019.
10.3760/cma.j.cn112338-20221212-01059
- VernacularTitle:我国2014-2019年季节性A（H3N2）流感的时空分布特征分析
- Author:
Ya Yun HAN
1
;
Jing YANG
2
;
Xiao Xu ZENG
1
;
Jia Ying YANG
3
;
Guang Xue HE
1
;
Da Yan WANG
1
;
Tao CHEN
1
Author Information
1. National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
2. Center of Health Emergency, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
3. School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
- Publication Type:Journal Article
- MeSH:
Humans;
Influenza, Human/epidemiology*;
China/epidemiology*;
Influenza A Virus, H3N2 Subtype;
Seasons;
Cluster Analysis
- From:
Chinese Journal of Epidemiology
2023;44(6):937-941
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To analyze the spatial and temporal distribution characteristics of seasonal A(H3N2) influenza [influenza A(H3N2)] in China and to provide a reference for scientific prevention and control. Methods: The influenza A(H3N2) surveillance data in 2014-2019 was derived from China Influenza Surveillance Information System. A line chart described the epidemic trend analyzed and plotted. Spatial autocorrelation analysis was conducted using ArcGIS 10.7, and spatiotemporal scanning analysis was conducted using SaTScan 10.1. Results: A total of 2 603 209 influenza-like case sample specimens were detected from March 31, 2014, to March 31, 2019, and the influenza A(H3N2) positive rate was 5.96%(155 259/2 603 209). The positive rate of influenza A(H3N2) was statistically significant in the north and southern provinces in each surveillance year (all P<0.05). The high incidence seasons of influenza A (H3N2) were in winter in northern provinces and summer or winter in southern provinces. Influenza A (H3N2) clustered in 31 provinces in 2014-2015 and 2016-2017. High-high clusters were distributed in eight provinces, including Beijing, Tianjin, Hebei, Shandong, Shanxi, Henan, Shaanxi, and Ningxia Hui Autonomous Region in 2014-2015, and high-high clusters were distributed in five provinces including Shanxi, Shandong, Henan, Anhui, and Shanghai in 2016-2017. Spatiotemporal scanning analysis from 2014 to 2019 showed that Shandong and its surrounding twelve provinces clustered from November 2016 to February 2017 (RR=3.59, LLR=9 875.74, P<0.001). Conclusion: Influenza A (H3N2) has high incidence seasons with northern provinces in winter and southern provinces in summer or winter and obvious spatial and temporal clustering characteristics in China from 2014-2019.
