Respiratory syncytial virus infection notification trends and interpretation of the reported case data, 2018-2021, Japan.

IF 1.3 4区 医学 Q4 INFECTIOUS DISEASES
Miyako Otsuka, Ayu Kasamatsu, Yuzo Arima, Takuri Takahashi, Takeshi Arashiro, Katsuhiro Komase, Reiko Shimbashi, Yuuki Tsuchihashi, Yusuke Kobayashi, Osamu Takahara, Kazuhiko Kanou, Motoi Suzuki
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引用次数: 0

Abstract

In Japan, as elsewhere, the COVID-19 pandemic affected the notification trends of respiratory syncytial virus (RSV) infection. Here, we describe the epidemiological trends of RSV cases among children reported during 2018-2021 in Japan, based on the national surveillance system. Compared to 2018 and 2019, 2020 saw an unprecedented decrease in RSV notifications per sentinel site. However, 2021 experienced an unseasonably early and high peak in week 28 (peak week in 2018 and 2019: week 37) with a large resurgence in notifications, nationwide and across regions. Regarding age, compared to 2018 and 2019, the number and proportion of cases aged 2, 3, and ≥4-years increased substantially in 2021 but the number of cases aged <1 year decreased slightly. Furthermore, in 2021, the ratio of notifications per site from outpatient clinics to hospitals increased, suggesting a proportionate increase in clinically milder case diagnoses. Notably, RSV-attributed deaths from vital statistics also dropped substantially in 2020 and rebounded in 2021, but were fewer than in 2018 or 2019. While RSV incidence likely declined in 2020 (possibly from COVID-19 countermeasures) and increased in 2021, notifications in 2021 appeared to be associated with milder presentations. Given unpredictable RSV epidemiology, continuous monitoring and pluralistic assessments are imperative.

2018-2021 年日本呼吸道合胞病毒感染通报趋势及病例报告数据解读。
与其他地方一样,日本的 COVID-19 大流行也影响了呼吸道合胞病毒(RSV)感染的通报趋势。在此,我们根据国家监测系统描述了 2018-2021 年期间日本报告的儿童 RSV 病例的流行病学趋势。与 2018 年和 2019 年相比,2020 年每个哨点的 RSV 报告数量出现了前所未有的下降。然而,2021 年在第 28 周出现了一个反常的早期高峰(2018 年和 2019 年的高峰周:第 37 周),全国和各地区的通报数大幅回升。在年龄方面,与 2018 年和 2019 年相比,2021 年 2 岁、3 岁和≥4 岁病例的数量和比例大幅增加,但年龄在≥4 岁的病例数量和比例则有所下降。
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来源期刊
CiteScore
4.50
自引率
4.50%
发文量
172
审稿时长
2 months
期刊介绍: Japanese Journal of Infectious Diseases (JJID), an official bimonthly publication of National Institute of Infectious Diseases, Japan, publishes papers dealing with basic research on infectious diseases relevant to humans in the fields of bacteriology, virology, mycology, parasitology, medical entomology, vaccinology, and toxinology. Pathology, immunology, biochemistry, and blood safety related to microbial pathogens are among the fields covered. Sections include: original papers, short communications, epidemiological reports, methods, laboratory and epidemiology communications, letters to the editor, and reviews.
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