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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Informe sobre poplaciones clave.
Este documento dá orientações sobre o uso de máscaras na comunidade durante a assistência domiciliar e em serviços de saúde em regiões que têm relatado casos de COVID-19. É dirigido a indivíduos na comunidade, profissionais de saúde pública e de prevenção e controle de infecção (PCI...), administradores da saúde, profissionais de saúde e trabalhadores da saúde comunitária. O documento será revisado à medida que mais dados se tornarem disponíveis.
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Mund-Nasen-Bedeckung im öffentlichen Raum als weitere Komponente zur Reduktion der Übertragungen von COVID-19. Strategieergänzungen zu empfohlenen Schutzmaßnahmen und Zielen (3. Update) Das RKI empfiehlt ein generelles Tragen einer Mund-Nasen-Bedeckung (MNB) in bestimmten Situationen im öffentl...ichen Raum als einen weiteren Baustein, um Risikogruppen zu schützen und den Infektionsdruck und damit die Ausbreitungsgeschwindigkeit von COVID-19 in der Bevölkerung zu reduzieren. Diese Empfehlung beruht auf einer Neubewertung aufgrund der zunehmenden Evidenz, dass ein hoher Anteil von Übertragungen unbemerkt erfolgt, und zwar bereits vor dem Auftreten von Krankheitssymptomen. Ziel des im Epidemiologischen Bulletin 19/2020 veröffentlichten Artikels ist es, eine kurze Übersicht zum fachlichen Hintergrund der Empfehlung zu geben und zu erläutern, welche Dinge hierbei zu berücksichtigen sind.
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Guidance statement
Recommendations on contraceptive methods used by
women at high risk of HIV
Obesity and diabetes are affecting the peoples of the Americas at high and increasing rates. National surveys demonstrate that obesity is increasing in prevalence among all age groups; 7% to 12% of children under 5 years old and
one-fi fth of adolescents are obese, while rates of overweight and obe...sity among adults approach 60%. Obesity is the major modifi able risk factor for diabetes.
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SARS-CoV-2 infection and pulmonary tuberculosis: analysis of the situation in Peru
Nested case-control study of health workers exposed to confirmed COVID-19 patients.
Similar objectives to the cohort study but case-control studies may be cheaper and provide robust evidence to characterize and assess the risk factors for SARS-CoV-2 infection in health workers exposed to COVID-19 p...atients.
Health workers with confirmed COVID-19 will be recruited as cases and other health workers in the same health care setting without infection will be recruited as controls (incidence density sampling).
Secondary objectives are similar to the cohort study.
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This report summarizes the results of a 2018 survey of food and beverage marketing to children via television in the Kyrgyz Republic. It explores the extent and nature of children’s exposure to marketing for food high in saturated fat, free sugars and/or salt via television in the country. The stu...dy results can be used by policy-makers to restrict and regulate marketing of food high in saturated fat, free sugars and/or salt both on television and in other media.
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The growing understanding of how sequence information can contribute to improved public health is driving global investments in sequencing facilities and programmes. The falling cost and complexity of generating GSD provides opportunities for expanding sequencing capacity; however, challenges to wid...espread implementation remain. This document provides policy-makers and stakeholders with guidance on how to maximize the public health benefit of SARS-CoV-2 genomic sequencing activities in the short and long term as the pandemic continues to unfold. Practical considerations for the implementation of a virus genomic sequencing programme and an overview of the public health objectives of genomic sequencing are covered. This guidance focuses on SARS-CoV-2 but is applicable to other pathogens of public health concern.
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The WHO SAGE values framework for the allocation and prioritization of COVID-19 vaccination is intended to offer guidance on the prioritization of groups for vaccination when vaccine supply is limited. It provides a values foundation for the objectives of COVID-19 vaccination programmes and links t...hose to target groups for vaccination. This information is valuable to countries and globally while specific policies will be developed once vaccines become available.
This document it available in Arabic, Chinese English, French, Portuguese and Russian
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New data from the WHO reveal that an estimated 2.2 billion cases of malaria and 12.7 million deaths have been averted since 2000, but the disease remains a serious global health threat, particularly in the WHO African Region. According to WHO’s latest World malaria report, there were an estimated ...263 million cases and 597 000 malaria deaths worldwide in 2023. This represents about 11 million more cases in 2023 compared to 2022, and nearly the same number of deaths. Approximately 95% of the deaths occurred in the WHO African Region, where many at risk still lack access to the services they need to prevent, detect and treat the disease.
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Scientific Brief, 17 June 2020
There has never been a more critical moment to invest in WHO, and strengthen the unique role it plays in global health. Now is the time to sustainably finance WHO and invest in a healthy return for all.
In 2019, the Task Force on Fiscal Policy for Health concluded that taxes on tobacco, alcohol, and sugar-sweetened beverages were a highly effective but greatly underused policy tool to reduce consumption, save lives, and raise domestic resources. The Task Force estimated that if all countries increa...sed their excise taxes to raise prices by 50 percent, over 50 million premature deaths could be averted worldwide over the next 50 years while
raising over USD 20 trillion of additional revenue. Since the Task Force first convened, the world has faced a “polycrisis,” including a global pandemic, an economic recession, and the outbreak of wars in Europe and the Middle East. Against this backdrop, the world has also experienced prolonged health and fiscal crises. Health systems, weakened by the COVID-19 pandemic, lack sufficient financing to rebuild and respond to the surging noncommunicable diseases epidemic caused by uncontrolled risk factors such as tobacco, alcohol, and sugar consumption. Opportunities to raise domestic resources are limited and debt burdens have squeezed budgets. The period from 2019 to 2027 risks becoming a “lost decade” for health and social policies, with 110 countries facing little prospect of any
ability to raise government revenues beyond current levels. In this paper, we describe the current health and fiscal crises and review the contribution that health taxes could make in turning around this dire situation. We conclude that taxes on tobacco, alcohol, and
sugar-sweetened beverages are an ideal policy solution—good for the budget and good for health. These taxes are relatively quick to implement, and, unlike other taxes, do not put economic growth at risk—a vital benefit in the current era.
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