Journal of Shandong University (Health Sciences) ›› 2023, Vol. 61 ›› Issue (5): 96-101.doi: 10.6040/j.issn.1671-7554.0.2022.1036

• 公共卫生与管理学 • Previous Articles    

Pathogenic detection and epidemic characteristics of influenza in Shenzhen and Jinan from April 2016 to March 2022

DING Xiaoman1,2, LIU Hui3, QI Na1,2, WANG Xin3, WU Weihua3, SUN Ying3, LYU Yan1,2, ZHAO Huailong1,2, ZHAO Hong1,2, ZHAO Baotian1,2, JIAO Haitao1,2, FANG Shisong3, LIU Lanzheng1,2   

  1. 1. Institute of Viral Diseases, Jinan Municipal Center for Disease Control and Prevention, Jinan 250021, Shandong, China;
    2. Institute of Viral Diseases, Jinan Municipal Center for Disease Control and Prevention Affiliated to Shandong University, Jinan 250021, Shandong, China;
    3. Institute of Pathogenic Biology, Shenzhen Municipal Center for Disease Control and Prevention, Shenzhen 518055, Guangdong, China
  • Published:2023-05-15

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Abstract: Objective To analyze the epidemic characteristics of influenza in Shenzhen and Jinan from April 2016 to March 2022, so as to explore the differences between the north and south of China. Methods Data of influenza-like illness(ILI)and virologic surveillance of national sentinel hospitals of Shenzhen and Jinan were analyzed to determine the epidemic trend and characteristics of influenza during 2016 and 2022. Results The average percentage of ILI(ILI%)were 2.25% and 3.45% in Shenzhen and Jinan, and the years with the highest ILI% in both cities were from 2021 to 2022. Children aged 0 to 4 years were the most vulnerable group, accounting for 40% and 46% of all cases in Shenzhen and Jinan, respectively. The monthly ILI% and influenza virus were positively correlated in Shenzhen and Jinan(r=0.238, P<0.05; r=0.425, P<0.001). The dominant influenza virus subtypes varied in the different influenza seasons, while the subtypes of prevalent strains in each year and the dominant strains in epidemic peak were basically the same in both cities. Conclusion At the beginning of the novel coronavirus pneumonia epidemic(2020-2021), the influenza activity was significantly lower than the average level in previous years and the circulating virus type was single in Shenzhen and Jinan. The epidemic characteristics of influenza in the other monitoring years were basically consistent with the influenza epidemic characteristics in the south and north of China.

Key words: Influenza virus, Influenza-like illness, Virus subtypes, Surveillance, Epidemiological characteristics

CLC Number: 

  • R183.3
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