OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (12): 1670-1674.

• Treatise—School Health • Previous Articles     Next Articles

Study on influencing factors of influenza like cluster epidemics in schools in Jing'an District of Shanghai from 2019 to 2023

CHEN Hong, LYU Lixue, NI Xiaofen, REN Dongsheng, ZHOU Zhou   

  1. Shanghai Jing'an District Center for Disease Control and PreventionShanghai 200072, China
  • Received:2025-02-26 Revised:2025-06-24 Online:2026-06-15 Published:2026-06-18

Abstract:

Objective To retrospectively analyze the characteristics and influencing factors of clustered influenza like cases in schools in Jing'an District of Shanghai from 2019 to 2023,in order to provide a basis for improving the prevention and control of infectious diseases in schools. Methods The distribution characteristics of clustered influenza like cases in schools reported in Jing'an District of Shanghai from 2019 to 2023 were analyzed,while the current status of school prevention and control facilities such as material reserves,isolation classroom settings,and health teacher prevention and control literacy was explored,and the data were analyzed. Results Among 105 reported cases,the year with the highest concentration of influenza like cases was 2019(54.29%),followed by 2023(37.14%). The report month showed a unimodal distribution,mainly concentrated between November and March of the following year,with the most frequent month being December(38.10%),followed by February(14.29%). Among different school stages,the incidence of clustered epidemics was the highest in primary school(58.82%),junior high school(38.89%),and high school(31.58%)(χ2=45.115,P<0.05). The accumulated number of cases from a single epidemic were primary school>junior high school>high school(H=45.447,P<0.05). The average duration of the epidemic were primary school>high school>junior high school(H=46.432,P<0.05). The setting of separate passages and toilets in the isolation classroom,as well as the awareness of the definition of clustered epidemics and high incidence seasons by health teachers are influencing factors(all P<0.05). Conclusions According to the research results,non hygiene professionals such as cleaning staff who carry out disinfection work should receive strengthened training,and isolation measures should be strictly implemented. At the same time,the main factors affecting the incidence and scale of clustered epidemics,such as high incidence seasons and definitions of clustered epidemics,should be taken into account to prevent the occurrence and spread of clustered epidemics.

Key words: Influenza, School, Clustered epidemic, Influencing factors

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