Bulletin of the World Health Organization, 2000, 78 (6)
As vacinas COVID-19 são eficazes contra novas variantes? O que significa para uma pessoa estar totalmente vacinada? Essa e outras dúvidas estão entre as dúvidas mais frequentes sobre a vacinação contra a COVID-19. Nesta sexta edição você encontrará respostas para essas e outras perguntas.
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Available in English, French, Spanish and Portuguese
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14 de setembro de 2020Este Modelo de Valores fornece orientações globais para alocação de vacinas contra a COVID-19 entre os países, e orientações nacionais de priorização de grupos para vacinação dentro dos países em caso de oferta limitada. O Modelo destina-se a auxiliar os elaboradore...s de políticas públicas e assessores especializados nos âmbitos global, regional e nacional nas decisões sobre alocação e priorização de vacinas contra a COVID-19. Este documento foi endossado pelo Grupo Consultivo Estratégico de Especialistas em Imunização
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The Ethiopia Multi-Sectorial Cholera Elimination Plan (2022-2028) outlines a national strategy to eliminate cholera in Ethiopia by 2028. The plan follows the Global Roadmap to End Cholera by 2030 and is based on six key pillars: Leadership & Coordination, Water, Sanitation & Hygiene (WASH), Surveill...ance & Reporting, Use of Oral Cholera Vaccines (OCV), Healthcare System Strengthening, and Community Engagement.
Ethiopia has historically faced recurrent cholera outbreaks due to poor sanitation, unsafe water, and weak health infrastructure. The plan prioritizes high-risk areas (hotspot woredas) and aims to reduce cholera-related mortality by 90% by 2028. It includes efforts to improve WASH conditions, strengthen disease surveillance, enhance rapid response capabilities, expand vaccination campaigns, and integrate cholera control into broader health policies.
The government, in collaboration with international partners such as WHO, UNICEF, and the Global Task Force for Cholera Control (GTFCC), will implement and monitor the plan. The estimated budget for the initiative is $390 million over eight years. Ethiopia aims to achieve zero cholera transmission in hotspot regions, ensuring sustainable public health improvements.
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The Ethiopia Cholera Outbreak - Flash Update #8 reports a worsening cholera crisis, with 11,407 cases and 156 deaths as of June 20, 2023. The outbreak, ongoing since August 2022, has spread across 79 districts in Oromia, Somali, SNNP, and Sidama regions, increasing by 85% since May.
Key challenges ...include contaminated water, insecurity, floods, and a global vaccine shortage, leaving 7.7 million people at risk. Only 15% of affected areas have contained the disease. A vaccination campaign has reached 1.9 million people, and 81 Cholera Treatment Centers (CTCs) have been set up, but funding remains critically low.
The United Nations (OCHA) warns that the upcoming rainy season may worsen the outbreak, requiring urgent intervention.
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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...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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The Lancet Regional Health - Americas 2024;30: 100681
Published Online 3 February 2024 https://doi.org/10.1016/j.lana.2024.100681
Sudan virus disease is a severe, often fatal illness affecting humans and other primates that is due to Orthoebolavirus sudanense (Sudan virus), a viral species belonging to the same genus of the virus causing Ebola virus disease. This webinar will provide an overview of the current outbreak of Suda...n virus disease: what we know, the current outbreak in Uganda, and prevention and control measures.
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Lancet Glob Health 2016; 4: e856–63. Open Access
The article "Effectiveness of one dose of oral cholera vaccine in response to an outbreak: a case-cohort study" investigates whether a single dose of the Shanchol oral cholera vaccine can provide effective protection during an outbreak. Conducted i...n Juba, South Sudan, in 2015, the study involved a case-cohort approach, analyzing vaccination status and disease outcomes.
Findings showed that a single dose was 80.2% effective in preventing medically attended cholera cases, increasing to 87.3% after adjustments for confounding factors. These results suggest that a single-dose strategy can be an effective emergency response, particularly in settings with limited vaccine supply and high mobility of affected populations. The study supports using a single-dose approach during outbreaks when a two-dose regimen is logistically challenging.
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The Lancet Global Health, published online 18 August 2017;
http://dx.doi.org/10.1016/S2214-109X(17)30332-7
The article "The Political Determinants of the Cholera Outbreak in Yemen" examines how the ongoing civil war has contributed to Yemen’s severe cholera outbreak. The 2017 epidemic was des...cribed as the worst in the world, with cholera spreading rapidly due to the collapse of health, water, and sanitation systems.
The analysis shows that Houthi-controlled areas were disproportionately affected, accounting for 77.7% of cases and 80.7% of deaths. The article highlights the role of the Saudi-led coalition in worsening conditions through airstrikes on infrastructure, blockades restricting medical and food supplies, and the overall humanitarian crisis. It criticizes UNICEF for accepting a $67 million donation from Saudi Arabia while the coalition contributed to the crisis.
The article underscores that political actions and conflict have been key factors in the outbreak’s severity, with both warring sides failing to protect civilians.
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The Lancet Volume 5, Issue 10100972October 2024 Chagas Disease Serie 3
This document focuses on making recommendations for the diagnosis and treatment of Chagas disease, an infection caused by Trypanosoma cruzi, the protozoan agent of a systemic parasitic disease. Methodology: These clinical practice guidelines were prepared following the WHO handbook for guideline dev...elopment (5). A multidisciplinary development group was formed, comprised of thematic experts, epidemiologists, methodologists, and users. Since there were no existing guidelines that could be adapted, the guidelines were developed from scratch.
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PLoS Negl Trop Dis 13(10): e0007694. In 2005, the World Health Organization (WHO) recognized Chagas disease (CD; Trypanosoma cruzi infection) as a neglected tropical disease (NTD) [1] and included it into the global plan to combat NTDs [2]. The Target 3.3 of the United Nations Sustainable Developmen...t Goals (UN/SDG) aims at ending the epidemics of NTDs by 2030 [3]. Mother-to-child (congenital/connatal) transmission is currently the main mode of transmission of T. cruzi over blood transfusions and organ transplantations in vector-free areas within and outside Latin America (LA). Based on recent demonstrations that congenital transmission can be prevented [4–7], WHO has shifted its objective, in 2018, from control to elimination of congenital CD (cCD).
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Durante muchos años, la enfermedad de Chagas ha sido una entidad olvidada en nuestro medio, pese a que Colombia posee las condiciones apropiadas para que esta infección se desarrolle y se perpetúe en el tiempo.
Esto se refleja en el poco conocimiento de la enfermedad y en la existencia de muchos... individuos que sufren una pérdida significativa de su calidad y esperanza de vida, así como en costos importantes para el sistema de salud.
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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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Schistosoma haematobium is a parasitic digenetic trematode responsible for schistosomiasis (also known as bilharzia). The disease is caused by penetration of the skin by the parasite, spread by intermediate host molluscs in stagnant waters, and can be treated by administration of praziquantel. Schis...tosomiasis is considered to be an important but neglected tropical disease.
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