International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2026
Cooperative surveillance association and incidence of infectious diseases in Japanese nursery schools.
СтатьяНазвание и аннотация: Перевод в очереди
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Kurita Junko, Mukasa Kyoko, Kawana Yukari, Kaneko Mizuho, Yamaguchi Aya, Sunadori Asami, Hiraguri Saki, Murata Nobuhiro, Sugawara Tamie, Sugiyama Minako, Watase Hirotoshi, Nohara Michiko
Аннотация
OBJECTIVES: The Nursery School Absenteeism Surveillance System (NSASSy) has operated since 2010, but assessing NSASSy effectiveness at controlling outbreaks has been difficult.
OBJECT: This study was conducted to demonstrate NSASSy effects for reducing infectious disease incidence at NSASSy-participating nursery schools.
METHODS: In two cities, we acquired NSASSy information from nursery schools with more than 80 children. The study period for one city extended from April 1, 2016 through March in 2019, and for another city from January 1, 2024 through May 20, 2025. We examined the incidence of influenza and COVID-19 and symptoms for age classes at each facility compared to their proportions of data entry to NSASSy, community outbreaks in national official surveillance, and their mutual interaction terms. The estimation procedure was the individual effect model with a random effect of the facility.
RESULTS: The relation of influenza to community outbreak was found to be significant and positive. Interaction terms between data entry rates and community outbreaks were significant and negative for both cities. For COVID-19, no association was found. Regarding symptoms, for all symptoms and fever, relations to data entry rates were significant and negative in both cities. Regarding respiratory symptoms and diarrhea, the rate was significant and negative in one city.
DISCUSSION AND CONCLUSION: Results show that NSASSy mitigated community influenza outbreak effects on outbreaks at nursery schools not only before the COVID-19 pandemic, but also after the pandemic. Moreover, NSASSy reduced the rates of incidence of all symptoms.
OBJECT: This study was conducted to demonstrate NSASSy effects for reducing infectious disease incidence at NSASSy-participating nursery schools.
METHODS: In two cities, we acquired NSASSy information from nursery schools with more than 80 children. The study period for one city extended from April 1, 2016 through March in 2019, and for another city from January 1, 2024 through May 20, 2025. We examined the incidence of influenza and COVID-19 and symptoms for age classes at each facility compared to their proportions of data entry to NSASSy, community outbreaks in national official surveillance, and their mutual interaction terms. The estimation procedure was the individual effect model with a random effect of the facility.
RESULTS: The relation of influenza to community outbreak was found to be significant and positive. Interaction terms between data entry rates and community outbreaks were significant and negative for both cities. For COVID-19, no association was found. Regarding symptoms, for all symptoms and fever, relations to data entry rates were significant and negative in both cities. Regarding respiratory symptoms and diarrhea, the rate was significant and negative in one city.
DISCUSSION AND CONCLUSION: Results show that NSASSy mitigated community influenza outbreak effects on outbreaks at nursery schools not only before the COVID-19 pandemic, but also after the pandemic. Moreover, NSASSy reduced the rates of incidence of all symptoms.