norovirus outbreak 2023

Updated contact details for Yorkshire and the Humber HPT. There were 225 norovirus outbreaks reported to the CDC between Aug. 1, 2022, and Jan. 8, 2023, compared to 172 outbreaks during the same period the previous season, according to CDC data. In order to capture the winter peak of activity in the reporting period the norovirus and rotavirus season runs from week 27 in year 1 to week 26 in year 2, that is, week 27 2021 to week 26 2022, July to June. Stomach viruses are back up on cruise ships, with hundreds falling ill Summary of norovirus and rotavirus laboratory surveillance and enteric virus outbreaks in hospital and community settings in England during the 2021 to 2022 season. You can change your cookie settings at any time. Throughout the 2021/2022 and 2022/2023 seasons to date, reports of suspected and confirmed norovirus outbreaks in hospitals (captured by HNORS),have been substantially lower than the 5-season average. This molecular surveillance enables detection of novel strains or emergence of existing strains that could lead to a strain replacement event and which have previously been associated with a temporal shift in norovirus activity (2). Published: Feb. 14, 2023, 9:46 a.m. A microscopic image of norovirus, a very contagious virus that can cause diarrhea and vomiting. UKHSA routinely undertakes norovirus characterisation as part of national surveillance to monitor the diversity of circulating strains. Historically between 1995 and 2013 there have been 5 global GII.4 strain replacements events (3, 4). 17:00 - 18:00. Therefore, data pertaining to the most recent 2 weeks is not included. The 2021 to 2022 and 2022 to 2023 seasons are compared to the 5-season average calculated from the 5-season period of 2014 to 2015, to 2018 to 2019. All surveillance data included in this report is extracted from live reporting systems, is subject to a reporting delay, and the number reported in the most recent weeks may rise further as more reports are received. Additional analyses of these data have been undertaken and demonstrate the quality of this data is now comparable with the data collected before the pandemic and therefore reporting can resume as an Official Statistic. The reduction in norovirus reporting to national surveillance during the 2019 to 2020 and 2020 to 2021 seasons lead to a period of low referral of norovirus-positive samples for characterisation, therefore this data is not presented. However, when considering the surveillance data reported here, the magnitude of the reduction is unlikely to be wholly attributable to these control measures alone. The best thing you can do is drink water regularly. The coronavirus (COVID-19) pandemic led to many changes which likely had a negative effect on surveillance indicators, but which also likely resulted in reduced norovirus and rotavirus (and other enteric virus) transmission. However, it has not returned to the overall seasonal trend observed pre-pandemic during the 2021/2022 season. Only 13.7% of reportedEVoutbreaks were laboratory confirmed as norovirus during the previous 5 seasons. Norovirus activity varies from season to season and therefore differences will be observed between every season. 25 May 2023. Data presented here is provided by UKHSAs Enteric Virus Unit (EVU). Most reported cases are in the over 65s and were also seeing a rise in reported outbreaks, particularly in care home settings. This molecular surveillance enables detection of novel strains or emergence of existing strains that could lead to a strain replacement event and which have previously been associated with a temporal shift in norovirus activity (2). Following the introduction of the rotavirus vaccine in July 2013 the total number of laboratory-confirmed rotavirus infections each season has remained low compared to the pre-vaccine period. The total number of EV outbreaks reported in weeks 50 and 51 decreased compared with weeks 48 and 49, this reduction was mostly attributable to a drop in outbreaks reported in educational settings and coincides with the Christmas holiday period. Of the outbreaks attributed to EVs, 98.4% were reported as suspected and confirmed norovirus outbreaks. Norovirus (vomiting bug) - NHS One of the best ways to prevent the spread of norovirus is by practising good hand hygiene. This publication is licensed under the terms of the Open Government Licence v3.0 except where otherwise stated. Norovirus outbreaks increasing in England - GOV.UK Measles cases require urgent notification 24 May 2023 Mpox website resources updated 22 May 2023 25-27 Middle Gardiner St, Dublin 1 Ireland. It will take only 2 minutes to fill in. The reduction in norovirus reporting to national surveillance during the 2019 to 2020 and 2020 to 2021 seasons lead to a period of low referral of norovirus-positive samples for characterisation, therefore this data is not presented. The Second-Generation Surveillance System (SGSS) is the national laboratory reporting system, recording positive laboratory reports of norovirus and rotavirus. Norovirus activity has decreased in recent weeks, norovirus laboratory reports during weeks 18 to 21 of the 2022 to 2023 season were comparable to the 5-season average of the same period prior to the emergence of COVID-19 (2014/2015 to 2018/2019). The reliance on manual data collation during this period may have negatively impacted ascertainment so trends should be interpreted with caution. June 23, 2023. Therefore, data pertaining to the most recent 2 weeks is not included. The COVID-19 pandemic led to many changes that likely had a negative effect on surveillance indicators, but which also likely resulted in reduced norovirus and rotavirus (and other EV) transmission. Please see data sources and reporting caveats for more information, for guidance on interpretation of trends and the impact of the COVID-19 pandemic. Between December 2020 and October 2022, the report was replaced by the National norovirus and rotavirus bulletin to ensure an overview of norovirus and rotavirus activity in England continued to be available to the public (data covering the periods 2020/2021 and 2021/2022 is available at National norovirus and rotavirus bulletins 2020 to 2021: management information. 2 May 2023. In order to capture the winter peak of activity in the reporting period the norovirus and rotavirus season runs from week 27 in year 1 to week 26 in year 2, that is, week 27 2021 to week 26 2022, July to June. The latest national UK Health Security Agency (UKHSA) surveillance data shows that laboratory reports of norovirus are 77% higher than the 5-season average for the same period prior to the coronavirus (COVID-19) pandemic. Of the 294 norovirus positive samples characterised during the 2022/2023 season to date, 73% (215 out of 294) were genogroup 2 (GII); 26% (76 out of 294) were genogroup 1 (GI) and 1% were mixed (3 out of 294). 1. Please direct any queries or comments to NoroOBK@ukhsa.gov.uk. Norovirus: Why it's on the rise, its symptoms, and how to treat it - Vox The Hospital Norovirus Outbreak Reporting System (HNORS) is a web-based scheme for reporting suspected and confirmed norovirus outbreaks in acute NHS trust hospitals, and captures information on the disruptive impact these outbreaks have in hospital settings. The COVID-19 pandemic impacted activity across many gastrointestinal pathogen surveillance indicators for England in 2020 and 2021, and reduced norovirus reporting continued into 2022. Well send you a link to a feedback form. During the 2022 to 2023 season to date, the majority (84%) of samples characterised were norovirus Genogroup 2 (. For more information, see Outbreak surveillance section. You have rejected additional cookies. Norovirus genotype and GII.4 strain characterisation data from the reference laboratory are subject to a reporting delay, and the numbers reported in any week may rise further additional characterisation data become available. The incubation period of norovirus is 12-48 hours, which is the time between catching the virus and developing symptoms. There was also a substantial and sustained drop in the number of EV outbreaks reported to national surveillance following the emergence of COVID-19 in March 2020 and throughout the entire 2020 to 2021 season (data covering this period is available at National norovirus and rotavirus bulletins 2020 to 2021: management information). Zakikhany and others. Additionally, not all suspected cases are tested for norovirus, often only a proportion of individuals will be tested in any suspected outbreak. This report was produced by the Gastrointestinal Infections and Food Safety (One Health) Division, UKHSA. A 77% decrease in laboratory-confirmed rotavirus infections in infants was observed in the first season following vaccine introduction (1). Contacts: UKHSA health protection teams - GOV.UK The reduction in norovirus reporting to national surveillance during the 2019/2020 and 2020/2021 seasons lead to a period of low referral of norovirus-positive samples for characterisation, therefore this data is not presented. Please note HPZone Enteric Virus (EV) outbreak data for the current reporting period is unavailable. Please direct any queries or comments to NoroOBK@ukhsa.gov.uk. It is likely that other factors such as, but not limited to, changes in ascertainment, access to health care services and capacity for testing also contributed to the observed reduction due to changes in ascertainment and varied over time. Print. This publication is licensed under the terms of the Open Government Licence v3.0 except where otherwise stated. The reasons for the reduction in reporting over the pandemic are considered to be multifactorial (data covering this time period is available at National norovirus and rotavirus bulletins 2021 to 2022: management information and please see the impact of the COVID-19 pandemic on surveillance section for more details). We are grateful to all who provided data used in this report, including NHS Infection Control and Prevention staff (HNORSusers), UKHSA local teams (HPTs) and UKHSA regional teams (Field Services) and UKHSA Regional Public Health and Collaborating Laboratories. Reported rotavirus activity remained low throughout the whole 2020/2021 season (data covering this period is available at National norovirus and rotavirus bulletins 2021 to 2022: management information) and into the first half of the 2021/2022 season. Data presented here is derived from the Second-Generation Surveillance System (SGSS). Individuals are most infectious when symptomatic, but it is possible to. Where we have identified any third party copyright information you will need to obtain permission from the copyright holders concerned. Similar to norovirus there was a notable reduction in rotavirus activity from March 2020 onwards. It is likely that unusual norovirus activity will continue throughout the 2022/2023 season. HPZone is a web-based case and outbreak management system used by Health Protection Teams (HPTs) to record outbreaks they are notified of and investigate. Under-ascertainment is a recognised challenge in EV surveillance with sampling, testing and reporting criteria known to vary by region. Under-ascertainment is a recognised challenge in EV surveillance with sampling, testing and reporting criteria known to vary by region. Eight deaths were reported by 10 February 2023, prompting a local lockdown, while Cameroon introduced border restrictions. Well send you a link to a feedback form. This season the cumulative number of positive norovirus laboratory reports in England up to week 17 (7,473 laboratory reports) is 32% higher than the 5-season average for the same period prior to the pandemic (2014/2015 to 2018/2019) (5,657 laboratory reports). Norovirus is hard to kill, so here's what you need to know. Regular hand washing is really important to help stop the spread of this bug, but remember, alcohol gels do not kill off norovirus so soap and warm water is best. Outbreaks reported in care home settings increased from 47 in the week commencing 6 February 2023 to 54 in the week commencing 13 February 2023, this being the highest number of outbreaks reported in a week so far this season.
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