Epidemics最新文献

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Public health impact of the U.S. Scenario Modeling Hub 美国情景建模中心对公共卫生的影响。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100705
Rebecca K. Borchering, Jessica M. Healy, Betsy L. Cadwell, Michael A. Johansson, Rachel B. Slayton, Megan Wallace, Matthew Biggerstaff
{"title":"Public health impact of the U.S. Scenario Modeling Hub","authors":"Rebecca K. Borchering,&nbsp;Jessica M. Healy,&nbsp;Betsy L. Cadwell,&nbsp;Michael A. Johansson,&nbsp;Rachel B. Slayton,&nbsp;Megan Wallace,&nbsp;Matthew Biggerstaff","doi":"10.1016/j.epidem.2023.100705","DOIUrl":"10.1016/j.epidem.2023.100705","url":null,"abstract":"<div><p>Beginning in December 2020, the COVID-19 Scenario Modeling Hub has provided quantitative scenario-based projections for cases, hospitalizations, and deaths, aggregated across up to nine modeling groups. Projections spanned multiple months into the future and provided timely information on potential impacts of epidemiological uncertainties and interventions. Projections results were shared with the public, public health partners, and the Centers for Disease Control COVID-19 Response Team. The projections provided insights on situational awareness and informed decision-making to mitigate COVID-19 disease burden (e.g., vaccination strategies). By aggregating projections from multiple modeling teams, the Scenario Modeling Hub provided rapidly synthesized information in times of great uncertainty and conveyed possible trajectories in the presence of emerging variants. Here we detail several use cases of these projections in public health practice and communication, including assessments of whether modeling results directly or indirectly informed public health communication or guidance. These include multiple examples where comparisons of projected COVID-19 disease outcomes under different vaccination scenarios were used to inform Advisory Committee for Immunization Practices recommendations. We also describe challenges and lessons learned during this highly beneficial collaboration.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10179143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The interplay between susceptibility and vaccine effectiveness control the timing and size of an emerging seasonal influenza wave in England 易感性和疫苗有效性之间的相互作用控制着英格兰新出现的季节性流感浪潮的时间和规模。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100709
E. van Leeuwen , J. Panovska-Griffiths , S. Elgohari , A. Charlett , C. Watson
{"title":"The interplay between susceptibility and vaccine effectiveness control the timing and size of an emerging seasonal influenza wave in England","authors":"E. van Leeuwen ,&nbsp;J. Panovska-Griffiths ,&nbsp;S. Elgohari ,&nbsp;A. Charlett ,&nbsp;C. Watson","doi":"10.1016/j.epidem.2023.100709","DOIUrl":"10.1016/j.epidem.2023.100709","url":null,"abstract":"<div><p>Relaxing social distancing measures and reduced level of influenza over the last two seasons may lead to a winter 2022 influenza wave in England. We used an established model for influenza transmission and vaccination to evaluate the rolled out influenza immunisation programme over October to December 2022. Specifically, we explored how the interplay between pre-season population susceptibility and influenza vaccine efficacy control the timing and the size of a possible winter influenza wave. Our findings suggest that susceptibility affects the timing and the height of a potential influenza wave, with higher susceptibility leading to an earlier and larger influenza wave while vaccine efficacy controls the size of the peak of the influenza wave. With pre-season susceptibility higher than pre-COVID-19 levels, under the planned vaccine programme an early influenza epidemic wave is possible, its size dependent on vaccine effectiveness against the circulating strain. If pre-season susceptibility is low and similar to pre-COVID levels, the planned influenza vaccine programme with an effective vaccine could largely suppress a winter 2022 influenza outbreak in England.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10180749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Bayesian reconstruction of SARS-CoV-2 transmissions highlights substantial proportion of negative serial intervals 严重急性呼吸系统综合征冠状病毒2型传播的贝叶斯重建突出了负序列间隔的很大比例。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100713
Cyril Geismar , Vincent Nguyen , Ellen Fragaszy , Madhumita Shrotri , Annalan M.D. Navaratnam , Sarah Beale , Thomas E. Byrne , Wing Lam Erica Fong , Alexei Yavlinsky , Jana Kovar , Susan Hoskins , Isobel Braithwaite , Robert W. Aldridge , Andrew C. Hayward , Peter J. White , Thibaut Jombart , Anne Cori
{"title":"Bayesian reconstruction of SARS-CoV-2 transmissions highlights substantial proportion of negative serial intervals","authors":"Cyril Geismar ,&nbsp;Vincent Nguyen ,&nbsp;Ellen Fragaszy ,&nbsp;Madhumita Shrotri ,&nbsp;Annalan M.D. Navaratnam ,&nbsp;Sarah Beale ,&nbsp;Thomas E. Byrne ,&nbsp;Wing Lam Erica Fong ,&nbsp;Alexei Yavlinsky ,&nbsp;Jana Kovar ,&nbsp;Susan Hoskins ,&nbsp;Isobel Braithwaite ,&nbsp;Robert W. Aldridge ,&nbsp;Andrew C. Hayward ,&nbsp;Peter J. White ,&nbsp;Thibaut Jombart ,&nbsp;Anne Cori","doi":"10.1016/j.epidem.2023.100713","DOIUrl":"10.1016/j.epidem.2023.100713","url":null,"abstract":"<div><h3>Background</h3><p>The serial interval is a key epidemiological measure that quantifies the time between the onset of symptoms in an infector-infectee pair. It indicates how quickly new generations of cases appear, thus informing on the speed of an epidemic. Estimating the serial interval requires to identify pairs of infectors and infectees. Yet, most studies fail to assess the direction of transmission between cases and assume that the order of infections - and thus transmissions - strictly follows the order of symptom onsets, thereby imposing serial intervals to be positive. Because of the long and highly variable incubation period of SARS-CoV-2, this may not always be true (i.e an infectee may show symptoms before their infector) and negative serial intervals may occur. This study aims to estimate the serial interval of different SARS-CoV-2 variants whilst accounting for negative serial intervals.</p></div><div><h3>Methods</h3><p>This analysis included 5 842 symptomatic individuals with confirmed SARS-CoV-2 infection amongst 2 579 households from September 2020 to August 2022 across England &amp; Wales. We used a Bayesian framework to infer who infected whom by exploring all transmission trees compatible with the observed dates of symptoms, based on a wide range of incubation period and generation time distributions compatible with estimates reported in the literature. Serial intervals were derived from the reconstructed transmission pairs, stratified by variants.</p></div><div><h3>Results</h3><p>We estimated that 22% (95% credible interval (CrI) 8–32%) of serial interval values are negative across all VOC. The mean serial interval was shortest for Omicron BA5 (2.02 days, 1.26–2.84) and longest for Alpha (3.37 days, 2.52–4.04).</p></div><div><h3>Conclusions</h3><p>This study highlights the large proportion of negative serial intervals across SARS-CoV-2 variants. Because the serial interval is widely used to estimate transmissibility and forecast cases, these results may have critical implications for epidemic control.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10180751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The role of regular asymptomatic testing in reducing the impact of a COVID-19 wave 定期无症状检测在减少新冠肺炎疫情影响方面的作用。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100699
Miguel E.P. Silva , Martyn Fyles , Li Pi , Jasmina Panovska-Griffiths , Thomas House , Caroline Jay , Elizabeth Fearon
{"title":"The role of regular asymptomatic testing in reducing the impact of a COVID-19 wave","authors":"Miguel E.P. Silva ,&nbsp;Martyn Fyles ,&nbsp;Li Pi ,&nbsp;Jasmina Panovska-Griffiths ,&nbsp;Thomas House ,&nbsp;Caroline Jay ,&nbsp;Elizabeth Fearon","doi":"10.1016/j.epidem.2023.100699","DOIUrl":"10.1016/j.epidem.2023.100699","url":null,"abstract":"<div><p>Testing for infection with SARS-CoV-2 is an important intervention in reducing onwards transmission of COVID-19, particularly when combined with the isolation and contact-tracing of positive cases. Many countries with the capacity to do so have made use of lab-processed Polymerase Chain Reaction (PCR) testing targeted at individuals with symptoms and the contacts of confirmed cases. Alternatively, Lateral Flow Tests (LFTs) are able to deliver a result quickly, without lab-processing and at a relatively low cost. Their adoption can support regular mass asymptomatic testing, allowing earlier detection of infection and isolation of infectious individuals. In this paper we extend and apply the agent-based epidemic modelling framework <em>Covasim</em> to explore the impact of regular asymptomatic testing on the peak and total number of infections in an emerging COVID-19 wave. We explore testing with LFTs at different frequency levels within a population with high levels of immunity and with background symptomatic PCR testing, case isolation and contact tracing for testing. The effectiveness of regular asymptomatic testing was compared with ‘lockdown’ interventions seeking to reduce the number of non-household contacts across the whole population through measures such as mandating working from home and restrictions on gatherings. Since regular asymptomatic testing requires only those with a positive result to reduce contact, while lockdown measures require the whole population to reduce contact, any policy decision that seeks to trade off harms from infection against other harms will not automatically favour one over the other. Our results demonstrate that, where such a trade off is being made, at moderate rates of early exponential growth regular asymptomatic testing has the potential to achieve significant infection control without the wider harms associated with additional lockdown measures.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10548676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Density forecasting of conjunctivitis burden using high-dimensional environmental time series data 使用高维环境时间序列数据的结膜炎负荷密度预测。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100694
Jue Tao Lim , Esther Li Wen Choo , A. Janhavi , Kelvin Bryan Tan , John Abisheganaden , Borame Dickens
{"title":"Density forecasting of conjunctivitis burden using high-dimensional environmental time series data","authors":"Jue Tao Lim ,&nbsp;Esther Li Wen Choo ,&nbsp;A. Janhavi ,&nbsp;Kelvin Bryan Tan ,&nbsp;John Abisheganaden ,&nbsp;Borame Dickens","doi":"10.1016/j.epidem.2023.100694","DOIUrl":"10.1016/j.epidem.2023.100694","url":null,"abstract":"<div><p>As one of the most common eye conditions being presented at clinics, acute conjunctivitis puts substantial strain on primary health resources. To reduce this public health burden, it is important to forecast and provide forward guidance to policymakers by estimating conjunctivitis trends, taking into account factors which influence transmission. Using a high-dimensional set of ambient air pollution and meteorological data, this study describes new approaches to point and probabilistic forecasting of conjunctivitis burden which can be readily translated to other infectious diseases. Over the period of 2012 – 2022, we show that simple models without environmental data provided better point forecasts but the more complex models which optimized predictive accuracy and combined multiple predictors demonstrated superior density forecast performance. These results were shown to be consistent over periods with and without structural breaks in transmission. Furthermore, ecological analysis using post-selection inference showed that increases in SO<sub>2</sub>, O<sub>3</sub> surface concentration and total precipitation were associated to increased conjunctivitis attendance. The methods proposed can provide rich and informative forward guidance for outbreak preparedness and help guide healthcare resource planning in both stable periods of transmission and periods where structural breaks in data occur.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10177969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantifying individual-level heterogeneity in infectiousness and susceptibility through household studies 通过家庭研究量化传染性和易感性的个体水平异质性。
IF 3.8 3区 医学
Epidemics Pub Date : 2023-09-01 DOI: 10.1016/j.epidem.2023.100710
Thayer L. Anderson , Anjalika Nande , Carter Merenstein , Brinkley Raynor , Anisha Oommen , Brendan J. Kelly , Michael Z. Levy , Alison L. Hill
{"title":"Quantifying individual-level heterogeneity in infectiousness and susceptibility through household studies","authors":"Thayer L. Anderson ,&nbsp;Anjalika Nande ,&nbsp;Carter Merenstein ,&nbsp;Brinkley Raynor ,&nbsp;Anisha Oommen ,&nbsp;Brendan J. Kelly ,&nbsp;Michael Z. Levy ,&nbsp;Alison L. Hill","doi":"10.1016/j.epidem.2023.100710","DOIUrl":"10.1016/j.epidem.2023.100710","url":null,"abstract":"<div><p>The spread of SARS-CoV-2, like that of many other pathogens, is governed by heterogeneity. “Superspreading,” or “over-dispersion,” is an important factor in transmission, yet it is hard to quantify. Estimates from contact tracing data are prone to potential biases due to the increased likelihood of detecting large clusters of cases, and may reflect variation in contact behavior more than biological heterogeneity. In contrast, the average number of secondary infections per contact is routinely estimated from household surveys, and these studies can minimize biases by testing all members of a household. However, the models used to analyze household transmission data typically assume that infectiousness and susceptibility are the same for all individuals or vary only with predetermined traits such as age. Here we develop and apply a combined forward simulation and inference method to quantify the degree of inter-individual variation in both infectiousness and susceptibility from observations of the distribution of infections in household surveys. First, analyzing simulated data, we show our method can reliably ascertain the presence, type, and amount of these heterogeneities given data from a sufficiently large sample of households. We then analyze a collection of household studies of COVID-19 from diverse settings around the world, and find strong evidence for large heterogeneity in both the infectiousness and susceptibility of individuals. Our results also provide a framework to improve the design of studies to evaluate household interventions in the presence of realistic heterogeneity between individuals.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10233988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bayesian monitoring of COVID-19 in Sweden 瑞典COVID-19的贝叶斯监测
IF 3.8 3区 医学
Epidemics Pub Date : 2023-08-24 DOI: 10.1016/j.epidem.2023.100715
Robin Marin , Håkan Runvik , Alexander Medvedev , Stefan Engblom
{"title":"Bayesian monitoring of COVID-19 in Sweden","authors":"Robin Marin ,&nbsp;Håkan Runvik ,&nbsp;Alexander Medvedev ,&nbsp;Stefan Engblom","doi":"10.1016/j.epidem.2023.100715","DOIUrl":"10.1016/j.epidem.2023.100715","url":null,"abstract":"<div><p>In an effort to provide regional decision support for the public healthcare, we design a data-driven compartment-based model of COVID-19 in Sweden. From national hospital statistics we derive parameter priors, and we develop linear filtering techniques to drive the simulations given data in the form of daily healthcare demands. We additionally propose a posterior marginal estimator which provides for an improved temporal resolution of the reproduction number estimate as well as supports robustness checks via a parametric bootstrap procedure.</p><p>From our computational approach we obtain a Bayesian model of predictive value which provides important insight into the progression of the disease, including estimates of the effective reproduction number, the infection fatality rate, and the regional-level immunity. We successfully validate our posterior model against several different sources, including outputs from extensive screening programs. Since our required data in comparison is easy and non-sensitive to collect, we argue that our approach is particularly promising as a tool to support monitoring and decisions within public health.</p><p><strong>Significance:</strong> Using public data from Swedish patient registries we develop a national-scale computational model of COVID-19. The parametrized model produces valuable weekly predictions of healthcare demands at the regional level and validates well against several different sources. We also obtain critical epidemiological insights into the disease progression, including, e.g., reproduction number, immunity and disease fatality estimates. The success of the model hinges on our novel use of filtering techniques which allows us to design an accurate data-driven procedure using data exclusively from healthcare demands, i.e., our approach does not rely on public testing and is therefore very cost-effective.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10579781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Influence of setting-dependent contacts and protective behaviours on asymptomatic SARS-CoV-2 infection amongst members of a UK university 英国一所大学成员环境依赖性接触和保护行为对无症状SARS-CoV-2感染的影响
IF 3.8 3区 医学
Epidemics Pub Date : 2023-06-01 DOI: 10.1016/j.epidem.2023.100688
Emma L. Fairbanks , Kirsty J. Bolton , Ru Jia , Grazziela P. Figueredo , Holly Knight , Kavita Vedhara
{"title":"Influence of setting-dependent contacts and protective behaviours on asymptomatic SARS-CoV-2 infection amongst members of a UK university","authors":"Emma L. Fairbanks ,&nbsp;Kirsty J. Bolton ,&nbsp;Ru Jia ,&nbsp;Grazziela P. Figueredo ,&nbsp;Holly Knight ,&nbsp;Kavita Vedhara","doi":"10.1016/j.epidem.2023.100688","DOIUrl":"10.1016/j.epidem.2023.100688","url":null,"abstract":"<div><p>We survey 62 users of a university asymptomatic SARS-CoV-2 testing service on details of their activities, protective behaviours and contacts in the 7 days prior to receiving a positive or negative SARS-CoV-2 PCR test result in the period October 2020–March 2021. The resulting data set is novel in capturing very detailed social contact history linked to asymptomatic disease status during a period of significant restriction on social activities. We use this data to explore 3 questions: (i) Did participation in university activities enhance infection risk? (ii) How do contact definitions rank in their ability to explain test outcome during periods of social restrictions? (iii) Do patterns in the protective behaviours help explain discrepancies between the explanatory performance of different contact measures? We classify activities into settings and use Bayesian logistic regression to model test outcome, computing posterior model probabilities to compare the performance of models adopting different contact definitions. Associations between protective behaviours, participant characteristics and setting are explored at the level of individual activities using multiple correspondence analysis (MCA). We find that participation in air travel or non-university work activities was associated with a positive asymptomatic SARS-CoV-2 PCR test, in contrast to participation in research and teaching settings. Intriguingly, logistic regression models with binary measures of contact in a setting performed better than more traditional contact numbers or person contact hours (PCH). The MCA indicates that patterns of protective behaviours vary between setting, in a manner which may help explain the preference for any participation as a contact measure. We conclude that linked PCR testing and social contact data can in principle be used to test the utility of contact definitions, and the investigation of contact definitions in larger linked studies is warranted to ensure contact data can capture environmental and social factors influencing transmission risk.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10199488/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10052947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Empirical evidence of transmission over a school-household network for SARS-CoV-2; exploration of transmission pairs stratified by primary and secondary school SARS-CoV-2在学校-家庭网络传播的经验证据中小学分层传播对的探讨
IF 3.8 3区 医学
Epidemics Pub Date : 2023-06-01 DOI: 10.1016/j.epidem.2023.100675
Senna C.J.L. van Iersel , Jantien A. Backer , Rolina D. van Gaalen , Stijn P. Andeweg , James D. Munday , Jacco Wallinga , Albert Jan van Hoek , on behalf of the RIVM COVID-19 epidemiology and surveillance group
{"title":"Empirical evidence of transmission over a school-household network for SARS-CoV-2; exploration of transmission pairs stratified by primary and secondary school","authors":"Senna C.J.L. van Iersel ,&nbsp;Jantien A. Backer ,&nbsp;Rolina D. van Gaalen ,&nbsp;Stijn P. Andeweg ,&nbsp;James D. Munday ,&nbsp;Jacco Wallinga ,&nbsp;Albert Jan van Hoek ,&nbsp;on behalf of the RIVM COVID-19 epidemiology and surveillance group","doi":"10.1016/j.epidem.2023.100675","DOIUrl":"10.1016/j.epidem.2023.100675","url":null,"abstract":"<div><h3>Background</h3><p>Children play a key role in the transmission of many infectious diseases. They have many of their close social encounters at home or at school. We hypothesized that most of the transmission of respiratory infections among children occur in these two settings and that transmission patterns can be predicted by a bipartite network of schools and households.</p></div><div><h3>Aim and methods</h3><p>To confirm transmission over a school-household network, SARS-CoV-2 transmission pairs in children aged 4–17 years were analyzed by study year and primary/secondary school. Cases with symptom onset between 1 March 2021 and 4 April 2021 identified by source and contact-tracing in the Netherlands were included. In this period, primary schools were open and secondary school students attended class at least once per week. Within pairs, spatial distance between the postcodes was calculated as the Euclidean distance.</p></div><div><h3>Results</h3><p>A total of 4059 transmission pairs were identified; 51.9% between primary schoolers; 19.6% between primary and secondary schoolers; 28.5% between secondary schoolers. Most (68.5%) of the transmission for children in the same study year occurred at school. In contrast, most of the transmission of children from different study years (64.3%) and most primary-secondary transmission (81.7%) occurred at home. The average spatial distance between infections was 1.2 km (median 0.4) for primary school pairs, 1.6 km (median 0) for primary-secondary school pairs and 4.1 km (median 1.2) for secondary school pairs.</p></div><div><h3>Conclusion</h3><p>The results provide evidence of transmission on a bipartite school-household network. Schools play an important role in transmission within study years, and households play an important role in transmission between study years and between primary and secondary schools. Spatial distance between infections in a transmission pair reflects the smaller school catchment area of primary schools versus secondary schools. Many of these observed patterns likely hold for other respiratory pathogens.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9968452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9731503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Community incidence patterns drive the risk of SARS-CoV-2 outbreaks and alter intervention impacts in a high-risk institutional setting 社区发病率模式驱动了SARS-CoV-2暴发的风险,并改变了高风险机构环境中的干预影响
IF 3.8 3区 医学
Epidemics Pub Date : 2023-06-01 DOI: 10.1016/j.epidem.2023.100691
Sean M. Moore , Guido España , T. Alex Perkins , Robert M. Guido , Joaquin B. Jucaban , Tara L. Hall , Mark E. Huhtanen , Sheila A. Peel , Kayvon Modjarrad , Shilpa Hakre , Paul T. Scott
{"title":"Community incidence patterns drive the risk of SARS-CoV-2 outbreaks and alter intervention impacts in a high-risk institutional setting","authors":"Sean M. Moore ,&nbsp;Guido España ,&nbsp;T. Alex Perkins ,&nbsp;Robert M. Guido ,&nbsp;Joaquin B. Jucaban ,&nbsp;Tara L. Hall ,&nbsp;Mark E. Huhtanen ,&nbsp;Sheila A. Peel ,&nbsp;Kayvon Modjarrad ,&nbsp;Shilpa Hakre ,&nbsp;Paul T. Scott","doi":"10.1016/j.epidem.2023.100691","DOIUrl":"10.1016/j.epidem.2023.100691","url":null,"abstract":"<div><p>Optimization of control measures for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in high-risk institutional settings (e.g., prisons, nursing homes, or military bases) depends on how transmission dynamics in the broader community influence outbreak risk locally. We calibrated an individual-based transmission model of a military training camp to the number of RT-PCR positive trainees throughout 2020 and 2021. The predicted number of infected new arrivals closely followed adjusted national incidence and increased early outbreak risk after accounting for vaccination coverage, masking compliance, and virus variants. Outbreak size was strongly correlated with the predicted number of off-base infections among staff during training camp. In addition, off-base infections reduced the impact of arrival screening and masking, while the number of infectious trainees upon arrival reduced the impact of vaccination and staff testing. Our results highlight the importance of outside incidence patterns for modulating risk and the optimal mixture of control measures in institutional settings.</p></div>","PeriodicalId":49206,"journal":{"name":"Epidemics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223639/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9670293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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