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These guidelines provide guidance on how to detect an outbreak of the disease, conduct pertinent epidemiological investigations, and prevent or mitigate the spread of the disease throughout the Region. We encourage everyone working to apply these gu
...
idelines to take into account all the knowledge available and their own country’s capability to cope with the introduction of CHIKV. Steps should be taken now to put in place the necessary measures that will decrease the impact that this new arbovirus could have in our Region.
more
The global burden of disease (GBD) study provides information about fatal and non-fatal health outcomes around the world.
The objective of this work is to describe the burden of mental disorders among children aged 5–14 years in each of the six regions of the World Health Organisation. Data come
...
from the GBD 2015 study. Outcomes: disability-adjusted life-years (DALYs) are the main indicator of GBD studies and are built from years of life lost (YLLs) and years of life lived with disability (YLDs).
more
The following protocol has been designed to investigate the First Few X cases (FFX) and their close contacts. It is envisioned that the FFX 2019-nCoV investigation will be conducted across several countries or sites with geographical and demographical diversity. Using a standardized protocol such a
...
s the protocol provided here, epidemiological exposure data and biological samples can be systematically collected and shared rapidly in a format that can be easily aggregated, tabulated and analyzed across many different settings globally for timely estimates of 2019-nCoV infection severity and transmissibility, as well as to inform public health responses and policy decisions. This is particularly important in the context of a novel respiratory pathogen, such as 2019-nCoV
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Household transmission investigation protocol for 2019-novel coronavirus (2019-nCoV) infection
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The household transmission investigation is a case-ascertained prospective study of all identified household contacts of a laboratory confirmed 2019-nCoV infection (see 2.2 Study population). It is intended to provide rapid and early information on the clinical,
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epidemiological and virological characteristics of 2019-nCoV.
There are three primary objectives of this household transmission study:
To better understand the extent of transmission within a household by estimating the secondary infection rate for household contacts at an individual level, and factors associated with any variation in the secondary infection risk.
To characterize secondary cases including the range of clinical presentation, risk factors for infection, and the extent and fraction of asymptomatic infections.
To characterize serologic response following confirmed 2019-nCoV infection (highly encouraged, but optional depending on laboratory capacity and resources)
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This document provides guidance to Member States in the WHO European Region that wish to conduct behavioural insights studies related to COVID-19. Studies can be used to monitor public knowledge, ri
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sk perceptions, behaviours and trust with the overall aim to inform national COVID-19 outbreak response measures, including policies, interventions and communications.
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Many critical questions remain about the effectiveness of COVID-19 vaccines in real-world settings. These questions can only be answered in post-introduction vaccine effectiveness studies.This guidance document outlines an approach to leverage exist
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ing surveillance systems for Severe Acute Respiratory Infection (SARI) to estimate COVID-19 vaccine effectiveness (VE) in preventing SARI associated with laboratory-confirmed SARS-CoV-2 using existing SARI surveillance systems. The approach uses the test-negative design to evaluate VE; cases are SARI patients who tested positive for SARS-CoV-2, and controls are SARI patients who tested negative for SARS-CoV-2.
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Modelling the health impacts of disruptions to essential health services during COVID-19 Module 1
Several epidemiological models have been created to assess the potential impact of disruptions to essential health services caused by COVID-19 on morb
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idity and mortality from conditions other than COVID-19 illness. This guide presents models that have been used to assess these indirect impacts. The effects have been studied in various settings, using a variety of models.
The guide is intended for people who need to understand what the models say, their construction and their underlying assumptions, or need to use models and their outcomes for planning and programme development and to support policy decisions for a country or region.
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Onchocerciasis used to be an important public health problem in Africa, with over 37 million people infected and millions suffering from debilitating skin disease, terrible itching, impaired vision and
blindness. But the epidemiological situation h
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as improved dramatically over the last two decades. Community directed treatment with ivermectin has effectively brought the disease under control in most endemic areas where onchocerciasis is no longer a public health risk.
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Scabies is a global health concern disproportionately affecting vulnerable populations such as refugees and asylum seekers. Greece is a main point of entry in Europe for refugees, but epidemiological data on scabies in this population are scarce. We
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aimed to describe the epidemiology of scabies, including trends over the study period.
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It is impossible to address the many complex needs of respiratory virus surveillance with a single surveillance system. Multiple systems, investigations and studies must each be fit-for-purpose to specific priority surveillance objectives, and only
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together can they provide essential information to policy-makers. In essence, each surveillance approach fit together as “tiles in a mosaic” that provides a complete picture of respiratory viruses and the impact of associated illnesses and interventions at the country level. This mosaic framework demonstrates how surveillance approaches may be implemented as coordinated and collaborative systems, well-matched to specific priority objectives.
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I examine the effectiveness of donors in targeting the highest burden of malaria in the Democratic Republic of Congo when health information structure is fragmented. I exploit local variations in the burden of malaria induced by mining activities as well as financial and
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epidemiological data from health facilities to estimate how local aid is matching local health needs. Using a regression discontinuity design, I find significant but quantitatively small variations in aid to health facilities located within mining areas. Comparing local aid with the additional cost of treatment and prevention associated with the increased risk of malaria transmission, I find suggestive evidence that local populations with the highest burden of the disease receive a proportionately lower share of aid compared to neighbouring areas with reduced exposure to malaria infection. The evidence of disparities in the allocation of aid for malaria supports the view that donors may have inaccurate information about local population needs.
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The document “Guidelines for Writing Outbreak Investigation Reports” by the European Centre for Disease Prevention and Control provides practical guidance on how to prepare clear, structured, and scientifically sound reports after investigating a disease outbreak. It is mainly intended for epide
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miologists and public health professionals, particularly participants in the ECDC Fellowship Programme. The guide explains the purpose of outbreak investigation reports and describes the recommended structure and content of such reports, including sections such as background, objectives, methods, results, and conclusions. It also outlines how to present epidemiological, laboratory, and environmental findings, interpret the results, and formulate public health recommendations. Overall, the document aims to standardize outbreak reporting, improve the quality and clarity of reports, and ensure that investigation findings can effectively support public health decision-making and future outbreak prevention.
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The document “Guidelines for the Investigation and Control of Disease Outbreaks” provides practical guidance for public health professionals on how to detect, investigate, and manage outbreaks of communicable diseases. It describes the key steps of outbreak investigation, including confirming th
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e outbreak, establishing a case definition, collecting epidemiological and laboratory data, identifying the source and mode of transmission, and implementing control measures. The guidelines also explain how to organize outbreak response teams, communicate findings, and document results in outbreak reports. Overall, the document aims to support systematic and effective outbreak investigations in order to control disease spread and protect public health.
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mBio, Vol. 6 Issue 2, March/April 2015
Available evidence demonstrates that direct patient contact and contact with infectious body fluids are the primary modes for Ebola virus transmission, but this is based on a limited number of studies. In this
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review, the authors address what we know and what we do not know about Ebola virus transmission. They also hypothesize that Ebola viruses have the potential to be respiratory pathogens with primary respiratory spread.
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Objective: To review research on associations of trauma type with PTSD in the WHO World Mental Health (WMH) surveys, a series of epidemiological surveys that obtained representative data on trauma-specific PTSD.
Mental health disorders remain widely under-reported — in our section on Data Quality & Definitions we discuss the challenges of dealing with this data. Figures presented in this entry should be taken as estimates of mental health disorder prevalence — they do not strictly reflect diagnosis data
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(which would provide the global perspective on diagnosis, rather than actual prevalence differences), but are imputed from a combination of medical, epidemiological data, surveys and meta-regression modelling where raw data is unavailable. Further information can be found here.
Accessed April 15, 2019
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Impact of non-pharmaceutical interventions (NPIs) to reduce COVID-19 mortality and healthcare demand
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The global impact of COVID-19 has been profound, and the public health threat it represents is the most serious seen in a respiratory virus since the 1918 H1N1 influenza pandemic. Here we present the results of epidemiological modelling which has in
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formed policymaking in the UK and other countries in recent weeks.
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The NIAID Pandemic Preparedness Plan describes the strategy of the National Institute of Allergy and Infectious Diseases (NIAID) to strengthen research and development for future pandemic threats. The plan focuses on identifying and studying viruses with the potential to cause epidemics or pandemics
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and developing medical countermeasures such as vaccines, therapeutics and diagnostics. A key concept is the research on “prototype pathogens,” which represent virus families that may cause future outbreaks, allowing scientists to prepare tools and knowledge in advance. The document also outlines the importance of surveillance, epidemiological research, technological innovation, clinical trials and international collaboration to enable a faster and more effective response to emerging infectious diseases. Overall, the plan aims to improve scientific preparedness so that new health threats can be detected earlier and controlled more rapidly.
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This document is intended to serve as a reference for national public health policy-makers. It outlines the scope of potential meningitis surveillance strategies that make it possible to obtain the data required for epidemic detection, monitoring of epidem
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iological and microbiological trends, evaluation of meningitis control strategies and assessment of the impact of Nm A conjugate vaccine. Ultimately, it provides information that can be used to decide on a surveillance strategy that is tailored to the needs and capacity of a country.
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The technical note from the Global Task Force on Cholera Control (GTFCC) examines the risks and benefits of vaccinating pregnant women with WHO-prequalified oral cholera vaccines (OCVs) during mass vaccination campaigns. It highlights that three WHO-approved vaccines (Dukoral®, Shanchol™, and Euv
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ichol®) offer sustained protection and a strong safety profile.
While these vaccines are not explicitly contraindicated for pregnant women, there is limited clinical data on their use during pregnancy. However, studies indicate that pregnant women with cholera face higher risks of fetal loss, stillbirth, and complications, especially if they experience severe dehydration. Some evidence suggests that vaccination can reduce cholera incidence in pregnant women and indirectly protect infants.
Although no controlled trials have focused on pregnant women, retrospective studies in Guinea and Zanzibar showed no significant increase in adverse pregnancy outcomes after OCV administration. The GTFCC concludes that the benefits of vaccination outweigh the risks, particularly in high-risk areas, and recommends including pregnant women in cholera vaccination campaigns while continuing to monitor safety data.
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