This report investigates the impact of potential misclassification of samples on HIV prevalence estimates for 23 surveys conducted from 2010-2014. In addition to visual inspection of laboratory results, we examined how accounting for potential misclassification of HIV status through Bayesian latent ...class models affected the prevalence estimates. Two types of Bayesian models were specified: a model that only uses the individual dichotomous test results and a continuous model that uses the quantitative information of the EIA (i.e., the signal-to-cutoff values). Overall, we found that adjusted prevalence estimates matched the surveys’ original results, with overlapping uncertainty intervals. This suggested that misclassification of HIV status should not affect the prevalence estimates in most surveys. However, our analyses suggested that two surveys may be problematic. The prevalence could have been overestimated in the Uganda AIDS Indicator Survey 2011 and the Zambia Demographic and Health Survey 2013-14, although the magnitude of overestimation remains difficult to ascertain. Interpreting results from the Uganda survey is difficult because of the lack of internal quality control and potential violation of the multivariate normality assumption of the continuous Bayesian latent class model. In conclusion, despite the limitations of our latent class models, our analyses suggest that prevalence estimates from most of the surveys reviewed are not affected by sample misclassification.
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National AIDS and STI Control Program
Материалы научно-практической конференции с международным участием «Достижения в нейробиологии и терапии болезни Альцгеймера», посвященной памяти профессора Э..... Штернберга (Москва, 6 декабря 2013 г.)
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Relapsing malaria caused by Plasmodium vivax parasites poses a significant challenge to global malaria elimination efforts. About one third of the population remains at risk of contracting P. vivax malaria, and 85% of P. vivax infections stem from reactivated latent parasites, leading to chronic ana...emia and increased morbidity and mortality. In addition to diagnostic tools that can detect the acute, blood-stage of P. vivax, new tools are needed to detect the dormant infections before they reactivate and contribute to morbidity and onwards transmission
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The report aims to capture lessons from the COVID-19 pandemic and to highlight the opportunity for more ambitious global action: expanding sustainable access to vaccines for all towards the Immunization Agenda 2030 and pandemic prevention, preparedness and response efforts. The report is organized i...n two sections: the first section provides WHO insights on global vaccine market dynamics, drawing from data provided by Member States, which are, in turn, analysed and displayed in the second section.
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The purpose of this document is to provide interim guidance to laboratories and stakeholders involved in laboratory testing for Middle East respiratory syndrome coronavirus (MERS-CoV).
Development of one or more vaccines for Neisseria gonorrhoeae is an important objective for sexual and reproductive health worldwide, and for the fight against antimicrobial resistance.
WHO preferred product characteristics (PPCs) provide strategic guidance as to WHO’s preferences for new vacci...nes in priority disease areas. PPCs are intended to encourage innovation and development of vaccines for use in settings most relevant to the global unmet public health need.
Gonococcal vaccine PPCs describe global public health goals for gonococcal vaccines and preferred parameters pertaining to vaccine indications and target populations, safety and efficacy considerations, and immunization strategies.
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The recommendations in this guideline are intended to inform development of national and subnational health policies, clinical protocols and programmatic guides. The target audience includes national and subnational public health policy-makers, implementers and managers of maternal, newborn and chil...d health programmes, health-care facility managers, supervisors/instructors for in-service training, health workers (including midwives, auxiliary nurse-midwives, nurses, paediatricians, neonatologists, general medical practitioners and community health workers), nongovernmental organizations, professional societies involved in the planning and management of maternal, newborn and child health services, academic staff involved in research and in the pre-service education and training of health workers, and those involved in the education of parents.
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The Committee discussed the implications for preparedness for smallpox-like events reflected by the ongoing COVID-19 pandemic. The Committee noted how quickly diagnostics and vaccines could be developed and deployed when resources and political will were abundant. This rapidity was also due to the f...act that the genetic sequence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) had been shared worldwide. It was noted that in one country SARS-CoV-2 had been reconstructed in a laboratory from the viral genome sequence before the first case of COVID-19 had been reported, highlighting the benefits of synthetic biology technologies for accelerated development of diagnostics as well as the oft-described potential risks. Lessons learned about clinical care during the COVID-19 pandemic were also discussed.
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22 December 2020
The COVID-19 vaccine safety guidance manual has been developed upon recommendation and guidance of GACVS members, as well as by experts incorporating current and available information critical to all stakeholders when COVID-19 vaccines will be introduced.
For ease of use, the man...ual is available in a compiled form and in several separate modules that can be consulted individually. For each module, specific training material is also available to facilitate implementation.
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Will COVID-19 vaccines be safe? Will all the COVID-19 candidate vaccines be successful? What are the different phases a vaccine must go through to be approved? This document provides responses to the most frequently asked questions about candidate vaccines and access to COVID-19 vaccination.
Preferred product characteristics and clinical development considerations