[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-252636-105":53,"doc-detail-252636-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","acute-respiratory-infection-surveillance-weekly-report-key-figures-week-3-2026","Acute Respiratory Infection Surveillance Weekly Report - Key Figures - Week 3, 2026","","Acute Respiratory Infection (ARI) Surveillance Weekly Report compiles provisional weekly key figures for influenza, COVID-19, and multiple pediatric ARI-related conditions across Japan using sentinel surveillance. Sentinel sites include pediatrics and internal medicine, with specified pediatric pathogen sentinel sites sending specimens to prefectural public health laboratories. Case-based data are updated by compilation date while laboratory data are aggregated by specimen-collection period. Sentinel selection criteria changed on 7 April 2025 (week 15), requiring cautious time-series comparison.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/acute-respiratory-infection-surveillance-weekly-report-key-figures-week-3-2026/252636/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/acute-respiratory-infection-surveillance-weekly-report-key-figures-week-3-2026/252636.png","ImageObject",442,249,{"name":88,"@type":89},"Clementine","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-22","2026-09-13",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",10,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"What infections and conditions are included in the ARI weekly key figures?","Question",{"text":109,"@type":110},"Influenza and COVID-19 are reported from ARI sentinel sites, while RSV infection, herpangina, pharyngoconjunctival fever, and group A streptococcal pharyngitis are reported from pediatric sentinel sites.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"Why must time-series comparisons be interpreted cautiously after April 7, 2025 (Week 15)?",{"text":114,"@type":110},"Sentinel site selection criteria and the composition/number of sentinel sites changed on that date, affecting the denominator and making cross-period comparisons unreliable without considering the adjustment.",{"name":116,"@type":107,"acceptedAnswer":117},"How are laboratory surveillance numbers and positivity rates calculated in this report?",{"text":118,"@type":110},"Data are aggregated by specimen collection week, and positivity rate uses specimens tested as the denominator: (number positive / number tested) × 100. Test-result counts reflect data available at aggregation time and may differ from earlier publications.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},252636,1791458700,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":136,"language":137,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":138,"faqs":139,"seo_title":140,"seo_description":61,"update_tm":141,"read_time":76},1374391974564,"https://ap-avatar.wpscdn.com/avatar/14000253aa45c000a9e?x-image-process=image/resize,m_fixed,w_180,h_180&k=1779874745381141002","Japan Institute for Health Security/National Institute of Infectious Diseases/Department of Infectious Disease Surveillance  \nAcute Respiratory Infection Surveillance Weekly Report: Key Figures  \nWeek 3, 2026 (January 12, 2026 – January 18, 2026)  \nThis report provisionally provides key figures of Acute Respiratory Infection (ARI) weekly situational report. Influenza and COVID-19 are reported from ARI sentinel sites consisting of pediatrics and internal medicine departments, while Respiratory Syncytial Virus (RSV) infection, Herpangina, Pharyngoconjunctival fever, and Group A streptococcal pharyngitis are reported from pediatric sentinel sites.  \nBeginning April 7, 2025 (Week 15), the sentinel selection criteria were revised: Influenza/COVID-19 sentinel sites (approximately 5,000 medical facilities) were replaced by ARI sentinel sites (approximately 3,000 medical facilities), and the number of pediatric sentinel sites was reduced from approximately 3,000 to approximately 2,000. About 10% of those 3,000 sentinel sites send specimens to public health laboratories of each prefecture and are registered as ARI pathogen sentinel sites.  \nFor case-based surveillance, data from the most recent week are aggregated as of the compilation date, and data from previous weeks are re-presented. For laboratory surveillance, data for all periods are aggregated as of the compilation date. The status of infectious disease activity is interpreted by considering both the weekly “trends” and “levels”. Important notes are provided at the end of this report. Please be aware that the reported numbers are provisional and subject to revision.  \nFigure 1. The weekly number of ARI cases reported per ARI sentinel site  \nData source: Infectious Disease Surveillance in Japan; data as of January 21, 2026 (data range: April 7, 2025 – January 18, 2026).  \nFigure 1A. The weekly number of influenza and COVID-19 cases reported per ARI sentinel site  \nFigure 1B. The weekly number of cases of RSV infection, pharyngoconjunctival fever, herpangina, and group A streptococcal pharyngitis reported per pediatric sentinel site  \nData source: Infectious Disease Surveillance in Japan; data as of January 21, 2026 (data range: December 9, 2024 – January 18, 2026)  \nNote: The reported number of cases is a republication of the data presented in the Infectious Diseases Weekly Report (IDWR) for the corresponding week. Beginning April 7, 2025 (Week 15), the sentinel selection criteria were revised:  \nInfluenza/COVID-19 sentinel sites (approximately 5,000 medical facilities) were replaced by ARI sentinel sites (approximately 3,000 medical facilities), and the number of pediatric sentinel sites was reduced from approximately 3,000 to approximately 2,000.  \nTo account for the change in the number of sentinel sites, a space and a vertical dotted line are inserted between weeks 14 and 15 of 2025, and the bars for the earlier period are shaded.  \nFigure 3A. The number of ARI cases reported per ARI sentinel site by prefecture in week 3  \nFigure 3B. The number of sentinel-reported infectious disease cases per sentinel site by prefecture in week 3  \nData source: Infectious Disease Surveillance in Japan; data as of January 21, 2026 (data range: January 12, 2026 – January 18, 2026)  \nFigure 5. The weekly number of new hospital admissions with influenza and COVID-19 reported by designated sentinel hospitals  \nData source: Infectious Disease Surveillance in Japan; data as of January 21, 2026 (data range: December 9, 2024 – January 18, 2026)  \nFigure 6. The weekly number of detected pathogens based on specimen collection week  \nData source: Infectious Disease Surveillance in Japan; data as of January 21, 2026 (data range: April 7, 2025 – January 18, 2026).  \nNote: Data are aggregated by specimen collection week, not by reporting week. The number of test results reflects the data available at the time of aggregation, so they do not necessarily match the figures published in previous reports.  \nWhe","cbCaicMHDDBICZIf","https://ap.wps.com/l/cbCaicMHDDBICZIf","pdf",1370075,9,"English","# Acute Respiratory Infection Surveillance Weekly Report: Key Figures\n## Week 3, 2026 Overview\n## Sentinel Site Definitions and Revisions (Week 15)\n## Surveillance Methods: Case-based vs Laboratory\n## Figures and Data Sources\n## Interpretive Notes and Cautions","[{\"question\":\"What infections and conditions are included in the ARI weekly key figures?\",\"answer\":\"Influenza and COVID-19 are reported from ARI sentinel sites, while RSV infection, herpangina, pharyngoconjunctival fever, and group A streptococcal pharyngitis are reported from pediatric sentinel sites.\"},{\"question\":\"Why must time-series comparisons be interpreted cautiously after April 7, 2025 (Week 15)?\",\"answer\":\"Sentinel site selection criteria and the composition/number of sentinel sites changed on that date, affecting the denominator and making cross-period comparisons unreliable without considering the adjustment.\"},{\"question\":\"How are laboratory surveillance numbers and positivity rates calculated in this report?\",\"answer\":\"Data are aggregated by specimen collection week, and positivity rate uses specimens tested as the denominator: (number positive / number tested) × 100. Test-result counts reflect data available at aggregation time and may differ from earlier publications.\"}]","Acute Respiratory Infection Surveillance Weekly Report - Key Figures - Week 3, 2026 | PDF",1789262321]