Spatial and temporal distribution characteristics of seasonal A(H3N2) influenza in China, 2014-2019 / 中华流行病学杂志
Chinese Journal of Epidemiology
; (12): 937-941, 2023.
Article
in Zh
| WPRIM
| ID: wpr-985616
Responsible library:
WPRO
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.
Full text:
1
Index:
WPRIM
Main subject:
Seasons
/
Cluster Analysis
/
China
/
Influenza, Human
/
Influenza A Virus, H3N2 Subtype
Limits:
Humans
Country/Region as subject:
Asia
Language:
Zh
Journal:
Chinese Journal of Epidemiology
Year:
2023
Type:
Article