Epidemiology
Chagas disease (American trypanosomiasis) is caused by the protozoan parasite Trypanosoma cruzi, and transmitted to humans by infected triatomine bugs, and less commonly by transfusion, organ transplant, from mother to infant, and in rare instances, by ingestion of contaminated food or... drink.1-4 The hematophagous triatomine vectors defecate during or immediately after feeding on a person. The parasite is present in large numbers in the feces of infected bugs, and enters the human body through the bite wound, or through the intact conjunctiva or other mucous membrane.
Vector-borne transmission occurs only in the Americas, where an estimated 8 to 10 million people have Chagas disease.5 Historically, transmission occurred largely in rural areas in Latin America, where houses built of mud brick are vulnerable to colonization by the triatomine vectors.4 In such areas, Chagas disease usually is acquired in childhood. In the last several decades, successful vector control programs have substantially decreased transmission rates in much of Latin America, and large-scale migration has brought infected individuals to cities both within and outside of Latin America.
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Chagas disease is currently endemic and also predicted to be at increased transmission risk under future climate change scenarios. Similarly, an expansion of areas in the United States at increased risk for Chagas disease transmission is also expected over the next several decades under climate chan...ge scenarios. Of particular interest is the predicted northern shift of triatomine species to central regions of the United States with historically unsuitable climates for T. cruzi vectors. The weight of evidence regarding the influences climate change may pose on T. cruzi vector species distributions demonstrates the sensitivity of Chagas disease transmission to future climate variability. In order to advance forecasts for the impact climate change may have on Chagas disease transmission in the Americas, it is imperative to
further develop, utilize, and perhaps combine predictive species distribution modeling approaches that integrate accurate, long term data on climate variables, vector species distributions, Chagas disease incidence, as well as other socio-ecological variables.
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Development finance institutions owned by European governments and the World Bank Group are spending hundreds of millions of dollars on expensive for-profit hospitals in the Global South that block patients from getting care, or bankrupt them, with some even imprisoning patients who cannot afford th...eir bills. At the height of the COVID-19 pandemic, some of these same hospitals denied entry to patients suffering from the virus or sold intensive care beds at eyewatering prices to the highest bidder. These development institutions have woefully inadequate safeguards, invest via a complex web of tax-avoiding financial intermediaries, and offer little to zero evidence on the impacts their investments are having. Oxfam is calling on rich-country governments and the World Bank Group to immediately halt their spending on for-profit private healthcare, and for an urgent independent investigation to be conducted into all active and historic investments.
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Lancet Infectious Diseases Volume 22, Issue 11e327-e335.
In February, 2022, WHO published new guidelines with six recommendations to update the global public health strategy against schistosomiasis, including expansion of preventive chemotherapy eligibility from the predominant group of school-age...d children to all age groups (2 years and older), lowering the prevalence threshold for annual preventive chemotherapy, and increasing the frequency of treatment. This Review, written by the 2018-2022 Schistosomiasis Guidelines Development Group and its international partners, presents a summary of the new WHO guideline recommendations for schistosomiasis along with their historical context, supporting evidence, implications for public health implementation, and future research needs.
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This template dossier complements and should be used after fulfilling the criteria and preconditions specified in the Process of validation of elimination of kala-azar as a public health problem in South-East Asia. The national kala-azar programme should be in the consolidation phase of elimination;... that is, the annual incidence of kala-azar in the implementation unit is maintained below 1 case (new plus relapse) per 10 000 population for a minimum of 3 consecutive years.
The template is designed to help national kala-azar elimination programmes prepare a dossier documenting the essential evidence supporting the request to the World Health Organization (WHO) to validate the status of kala-azar elimination as a public health problem in their country. The information presented in this document will help independent assessors understand the national programme’s specific context, achievements and relevant epidemiological data.
The dossier should be organized according to the following sections:
- Description of the country context and health system capabilities
- Historical data and delineation of endemic areas
- Surveillance and elimination activities
- Epidemiological data
- Vector control strategy and activities
- Post-validation surveillance plan
Once the dossier is prepared, it should be examined and duly endorsed by the National Task Force on kala-azar elimination and/or neglected tropical diseases, or a similar body, before submission to WHO.
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There are indigenous communities at high risk in every country of the region. At stake are the lives of 45 million people who belong to more than 800 indigenous peoples. Of these, some 100 are spread across several countries, around 200 maintain voluntary isolation or are in initial contact, and nea...rly 500 are at risk of disappearing due to their reduced numbers. Due to their lower immune resistance, their lack of access to hospital care and the increasing penetration of extractive activities in their territories, indigenous communities in voluntary isolation or in initial contact are cause for particular concern.
Far from hospitals and the news cameras, indigenous people in Latin American become ill and die without access to the means needed to protect themselves. They face the pandemic in conditions of social exclusion, racism and discrimination, which highlights historical inequalities and extreme precariousness in basic and health services.
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Carbon dioxide emissions are the primary driver of global climate change. It’s widely recognised that to avoid the worst impacts of climate change, the world needs to urgently reduce emissions. But, how this responsibility is shared between regions, countries, and individuals has been an endless p...oint of contention in international discussions.
This debate arises from the various ways in which emissions are compared: as annual emissions by country; emissions per person; historical contributions; and whether they adjust for traded goods and services. These metrics can tell very different stories.
We teamed up with the YouTube channel, Kurzgesagt, to produce a video which explored these different metrics in detail: ‘Who is responsible for climate change? – Who needs to fix it?’. All of the data and research featured in this video is contained in this article: below we look in detail at the many ways emissions are broken down.
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Adolescence is a critical stage in life for physical, cognitive and emotional development, shaping future health and well-being. Comprehensive measurement of adolescent health is essential to prioritize health issues, guide interventions and track progress. However, global, regional and national ado...lescent health measurement has historically been inconsistent and incomplete.
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Left unabated, climate change will have catastrophic effects on the health of present and future generations. Such effects are already seen in Europe, through more frequent and severe extreme weather events, alterations to water and food systems, and changes in the environmental suitability for infe...ctious diseases. As one of the largest current and historical contributors to greenhouse gases and the largest provider of financing for climate change mitigation and adaptation, Europe’s response is crucial, for both human health and the planet. To ensure that health and
wellbeing are protected in this response it is essential to build the capacity to understand, monitor, and quantify health impacts of climate change and the health co-benefits of accelerated action.
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This report of the EFSA and ECDC presents the results of zoonoses monitoring activities carried out in 2020 in 27 EU Member States (MS) and nine non-MS. Key statistics on zoonoses and zoonotic agents in humans, food, animals and feed are provided and interpreted historically.
Alcohol use is deeply embedded in the social landscape of many societies, and some 2300 million people drink alcoholic beverages in most parts of the world. At the same time, more than half of the global population aged 15 years and older reported having abstained from drinking alcohol during the pr...evious 12 months. Several major factors have an impact on levels and patterns of alcohol consumption in populations – such as historical trends in alcohol consumption, the availability of alcohol, culture, economic status and implemented alcohol control measures. At the individual level the patterns and levels of alcohol consumption are determined by multiple factors that include gender, age and individual biological and socioeconomic vulnerability factors as well as the policy environment. Prevailing social norms that support drinking behaviour and mixed messages about the harms and benefits of drinking may encourage alcohol consumption, delay appropriate health-seeking behaviour and weaken community action.
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Health facilities in the Region of the Americas frequently suffer the effects of health emergencies and disasters, which jeopardize their ability to provide services to the population. The STAR-H methodology helps staff responsible for health emergency and disaster risk management to identify and as...sess risks as part of strategic planning to improve facility preparedness. It is intended to help them develop, with a multi-hazard approach, a response framework with operating procedures to deal with hazards of any type, scale, or frequency; determine roles and responsibilities; facilitate the effective use of resources; undertake strategic planning exercises, and improve the preparedness of facilities to effectively respond to and recover from impacts. This methodology is designed for use in health facilities of any size and capacity, and makes it possible to generate historical reports and national or subnational risk profiles. This information can be used to develop an effective health emergency and disaster risk management program.
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Indoor residual spraying (IRS) involves applying residual insecticide to potential vector resting sites on the interior surfaces of human dwellings or other buildings. The main aim of IRS is to kill vectors before they are able to transmit pathogens to humans. When carried out correctly, IRS has his...torically been shown to be a powerful intervention to reduce adult vector density and longevity for mosquitoes, sand flies and triatomine bugs and can reduce the transmission of vector-borne diseases.
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IHME’s Financing Global Health report provides an overview of health spending around the world, with a special focus on investments in health in low- and middle-income countries. The report examines how this funding for health is changing each year and forecasts how it may change in the future. Fi...nancing Global Health examines where money for health originates and what health issues it funds.
This year, Financing Global Health 2023 looks at how interest payments on loans that many countries took out during the COVID-19 pandemic to keep their economies afloat and their people protected are now straining health budgets. It also details how development partners’ investments in health in low- and middle-income countries – development assistance for health – have changed since reaching historic levels during the COVID-19 pandemic, dropping by $19.4 billion between 2021 and 2023, from $84.0 billion to $64.6 billion.
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El presente informe incluye análisis de consultas informales en cinco de las regiones de la OMS: la Región de África, la Región de las Américas (donde se realizaron consultas separadas para el Caribe y América del Norte, y para América Latina), la Región de Asia Sudoriental, la Región de Eu...ropa y la Región del Mediterráneo Oriental, junto con tres foros en la Región del Pacífico Occidental. Se analizan las similitudes generales, los matices regionales y las prioridades planteadas en las seis regiones de la OMS para la participación significativa de las personas con experiencias vividas.
El presente informe es la segunda publicación de la serie «De la intención a la acción», un conjunto de recursos destinados a mejorar la limitada base de evidencia sobre el impacto de la participación significativa y abordar la falta de enfoques normalizados sobre cómo hacer operativa esta participación. La serie «De la intención a la acción» pretende llevar esto a cabo proporcionando una plataforma desde la que las personas con experiencias vividas, y los defensores de organizaciones e instituciones, puedan compartir soluciones, retos y prácticas prometedoras relacionadas con esta agenda transversal. La serie «De la intención a la acción» también tiene como objetivo proporcionar poderosas historias, inspiración y evidencia para la 4.ª Reunión de Alto Nivel de las Naciones Unidas sobre las ENT que se celebrará en 2025 y la consecución de los Objetivos de Desarrollo Sostenible (ODS) de las Naciones Unidas para 2030.
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El presente informe incluye análisis de consultas informales en cinco de las regiones de la OMS: la Región de África, la Región de las Américas (donde se realizaron consultas separadas para el Caribe y América del Norte, y para América Latina), la Región de Asia Sudoriental, la Región de Eu...ropa y la Región del Mediterráneo Oriental, junto con tres foros en la Región del Pacífico Occidental. Se analizan las similitudes generales, los matices regionales y las prioridades planteadas en las seis regiones de la OMS para la participación significativa de las personas con experiencias vividas.
El presente informe es la segunda publicación de la serie «De la intención a la acción», un conjunto de recursos destinados a mejorar la limitada base de evidencia sobre el impacto de la participación significativa y abordar la falta de enfoques normalizados sobre cómo hacer operativa esta participación. La serie «De la intención a la acción» pretende llevar esto a cabo proporcionando una plataforma desde la que las personas con experiencias vividas, y los defensores de organizaciones e instituciones, puedan compartir soluciones, retos y prácticas prometedoras relacionadas con esta agenda transversal. La serie «De la intención a la acción» también tiene como objetivo proporcionar poderosas historias, inspiración y evidencia para la 4.ª Reunión de Alto Nivel de las Naciones Unidas sobre las ENT que se celebrará en 2025 y la consecución de los Objetivos de Desarrollo Sostenible (ODS) de las Naciones Unidas para 2030.
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Rabies is a fatal viral zoonosis and serious public health problem.1 All mammals are believed to be susceptible to the disease, and for the purposes of this document, use of the term animal refers to mammals. The disease is an acute, progressive encephalitis caused by viruses in the genus Lyssavirus....
2 Rabies virus is the most important lyssavirus globally. In the
United States, multiple rabies virus variants are maintained in wild mammalian reservoir populations such as raccoons, skunks, foxes, and bats. Although the United States has been declared free from transmission of canine rabies virus variants, there is always a risk of reintroduction of these variants.The rabies virus is usually transmitted from animal to animal through bites. The incubation period is
highly variable. In domestic animals, it is generally 3 to 12 weeks, but can range from several days to months, exceeding 6 months.8 Rabies is communicable during the period of salivary shedding of rabies virus. Experimental and historic evidence documents that dogs, cats, and ferrets shed the virus for a few days prior to the onset of clinical signs and during illness. Clinical signs of rabies are variable and include inappetance, dysphagia, cranial nerve deficits, abnormal behavior, ataxia, paralysis, altered vocalization, and seizures. Progression to death is rapid. There are currently no known effective rabies antiviral drugs.
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Dengue is a mosquito-borne viral disease that occurs mainly in the tropics and subtropics but has a high potential to spread to new areas. Dengue infections are climate sensitive, so it is important to better understand how changing climate factors affect the potential for geographic spread and futu...re dengue epidemics. Vectorial capacity (VC) describes a vector's propensity to transmit dengue taking into account human, virus, and vector interactions. VC is highly temperature dependent, but most dengue models only take mean temperature values into account. Recent evidence shows that diurnal temperature range (DTR) plays an important role in influencing the behavior of the primary dengue vector Aedes aegypti. In this study, we used relative VC to estimate dengue epidemic potential (DEP) based on the temperature and DTR dependence of the parameters of A. aegypti. We found a strong temperature dependence of DEP; it peaked at a mean temperature of 29.3°C when DTR was 0°C and at 20°C when DTR was 20°C. Increasing average temperatures up to 29°C led to an increased DEP, but temperatures above 29°C reduced DEP. In tropical areas where the mean temperatures are close to 29°C, a small DTR increased DEP while a large DTR reduced it. In cold to temperate or extremely hot climates where the mean temperatures are far from 29°C, increasing DTR was associated with increasing DEP. Incorporating these findings using historical and predicted temperature and DTR over a two hundred year period (1901-2099), we found an increasing trend of global DEP in temperate regions. Small increases in DEP were observed over the last 100 years and large increases are expected by the end of this century in temperate Northern Hemisphere regions using climate change projections. These findings illustrate the importance of including DTR when mapping DEP based on VC.
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A chronological map of the presence of Zika only in those countries for which there is evidence of indigenous transmission by mosquitos, excluding the many countries that have notified imported Zika infections.