Chikungunya virus (CHIKV) is currently one of the most relevant arboviruses to public health. It is a member of the Togaviridae family and alphavirus genus and causes an arthritogenic disease known as chikungunya fever (CHIKF). It is characterized by a multifaceted disease, which is distinguished fr...om other arbovirus infections by the intense and debilitating arthralgia that can last for months or years in some individuals. Despite the great social and economic burden caused by CHIKV infection, there is no vaccine or specific antiviral drugs currently available. Recent outbreaks have shown a change in the severity profile of the disease in which atypical and severe manifestation lead to hundreds of deaths, reinforcing the necessity to understand the replication and pathogenesis processes. CHIKF is a complex disease resultant from the infection of a plethora of cell types. Although there are several in vivo models for studying CHIKV infection, none of them reproduces integrally the disease signature observed in humans, which is a challenge for vaccine and drug development. Therefore, understanding the potentials and limitations of the state-of-the-art experimental models is imperative to advance in the field. In this context, the present review outlines the present knowledge on CHIKV epidemiology, replication, pathogenesis, and immunity and also brings a critical perspective on the current in vitro and in vivo state-of-the-art experimental models of CHIKF.
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This video highlights the significant risks that malaria poses to pregnant and breastfeeding women in malaria-endemic regions. It follows the stories of Angavu from Kenya, Moyinoluwa from Nigeria and Lamai from Thailand. It emphasises the severe consequences that malaria can have during pregnancy, i...ncluding miscarriage, stillbirth, low birth weight and maternal death. Due to safety concerns, pregnant women are often excluded from antimalarial drug trials, which causes long delays in effective medicines becoming available for this vulnerable group. To address this issue, the Medicines for Malaria Venture (MMV) launched the Malaria in Mothers and Babies (MiMBa) initiative, which aims to accelerate the discovery, development, and delivery of safe antimalarial treatments for pregnant and breastfeeding women. The initiative aims to close critical gaps in research, drug development, and access, ensuring that these women and their babies are better protected against malaria. The video calls for continued efforts to address the needs of underserved populations most affected by malaria.
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Zambia has completed the implementation of the National TB Strategic Plan (2017-2021) that set in motion the TB elimination agenda in Zambia through coordinated and accelerated TB response. During this period, the National TB and Leprosy Programme (NTLP) registered tremendous success.
The NTLP is ...poised to attain the ambitious goal pronounced by the government of eliminating TB by 2030, in line with the Sustainable Development Goals (SDGs) and the World Health Organization End TB Strategy. The programme exponentially increased TB notifications from as low as 35,922 people with TB in 2018 to 40,726 in 2020 and in 2021 the TB notifications rose to 50,825 (a 25% increase against 2020 performance). The NTLP also registered incredible success in sustaining high TB Preventive Treatment (TPT) initiations among persons living with HIV and a high TB treatment success rate among drug-susceptible TB cases. New and relapse TB notifications in children below 15 years increased by 43%, from 2,724 in 2020 to 3,890 in 2021. TB notifications ratio between children aged 0-4 and 5-14 was 0.9, an improvement from what we achieved in 2018 (the ratio was 0.7). The proportion of TB patients who are HIV positive continued to decrease, reaching 34% in 2021 from 39% in 2020. Sustained increases in TB notifications, treatment success rate, and TPT initiations have resulted in a rapid decrease in the TB incidence rate that reached 307 per 100,000 population in 2021 against a rate of 391 in 2015.
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Malaria remains a significant public health concern, particularly in sub-Saharan Africa, where the majority of cases and fatalities occur, especially among children under five. Although there was a significant decline in global mortality and incidence between 2000 and 2015, progress has stalled sinc...e the late 2010s due to climate change, conflict, drug and insecticide resistance, and the ongoing effects of the pandemic. Economic modelling shows that achieving the Sustainable Development Goal target of reducing malaria incidence by 90% by 2030 could generate substantial economic benefits, including an increase in GDP of $142.7 billion in endemic countries and $80.7 billion in global trade gains. To save lives, strengthen health systems, and drive sustainable economic growth, renewed investments in malaria control and elimination programmes, vaccine deployment, and coordinated international support are essential.
Accessed on 25/08/2025.
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Combination therapy is a cornerstone of modern malaria treatment, particularly in the context of widespread multidrug resistance. Using two or more antimalarial drugs with different mechanisms simultaneously enhances efficacy, shortens treatment duration, improves compliance and delays the developme...nt of resistance. Artemisinin-based combination therapies (ACTs), such as artemether–lumefantrine, artesunate–amodiaquine and artesunate–sulfadoxine/pyrimethamine, are highly effective in rapidly clearing parasites and reducing gametocyte carriage. They are also generally well tolerated. Non-artemisinin combinations, quinine-based regimens and novel combinations (e.g. piperaquine–dihydroartemisinin) offer alternative therapeutic options, although clinical experience with these remains limited. Although ACTs are the preferred first-line treatment, factors such as cost, local drug resistance patterns, safety during pregnancy and paediatric use must inform implementation and policy decisions.
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In the face of rapid increases in the number of hospitalizations due to COVID-19 in Latin America and the Caribbean, coupled with shortages of human and material resources, including medical equipment and gases, there is a need to redesign models of care in the Region to optimize available resources... and ensure that more patients receive the quantity and quality of oxygen they need. Oxygen is included in the World Health Organization’s list of essential medicines and is used to care for patients at all levels of integrated health services networks. The efficacy of oxygen use in the treatment of patients with respiratory conditions caused by COVID-19 has been demonstrated, but there is great opportunity to improve the effectiveness of its use if it is used in a rational, sustainable, and safe way. Bearing in mind that the efficacy of a health technology is measured by its benefit under actual conditions of use, practical actions can be taken to improve the use of medical oxygen and avoid oxygen shortages. A drug is considered to be used rationally when patients receive it according to their clinical needs, in doses appropriate to their individual needs, for an appropriate period, and at a low cost to them and their community. By providing instruction on the rational use of oxygen and promoting it, negative repercussions can be avoided, such as loss of efficacy as a result of activities related to oxygen storage, distribution, and administration. Rational use of oxygen also involves controlling waste due to leaks in storage and distribution systems, use of gas at incorrect pressures, use of incorrectly adjusted flowmeters, and disconnections, among other problems. Another aspect to consider is the provision of adequate technical support for all oxygen production systems, in terms of maintenance and calibration, availability of electrical energy, and specific knowledge about these systems. For these reasons, a set of guidelines has been put together for the development of an efficient management system to deal with situations of oxygen scarcity, both now and in the future.
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The World Health Organization Global TB Report provides a comprehensive and up-to-date assessment of the TB epidemic, and progress in the response, at global, regional and country levels.
The 2022 edition features data on disease trends and the response to the epidemic from 215 countries and area...s, including all 194 World Health Organization (WHO) Member States. It provides a comprehensive and up-to-date assessment of the TB epidemic, progress in the response at global, regional and country levels, as well as on the impact of the COVID-19 pandemic on TB services.
TB remains one of the top infectious killers in the world. This year’s report presents data on an increase in the number of people falling ill with TB and drug resistant TB for the first time in many years. Increases were also reported on the number of TB deaths, highlighting the severe impact of the COVID-19 pandemic and other crises on the TB response that has reversed years of progress. It also presents the status of progress towards targets set at the first-ever United Nations General Assembly high-level meeting on TB in 2018 as well as the targets of the WHO End TB Strategy and the Sustainable Development Goals.
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Non-communicable diseases (NCDs) pose a substantial threat to many health systems, especially in low-income and middle-income countries (LMICs) where they are already overstretched. In the past few decades, deaths from NCDs in LMICs have spiked, whereas numbers in high-income countries have stabilis...ed. Worryingly, a large proportion of deaths from NCDs (29%) in LMICs occur among people younger than 60 years compared with the proportion in high-income countries (13%). This finding has been attributed to poor access to effective and equitable health-care services in most LMICs. The threat of NCDs in LMICs was recognised by the UN 2011 High-Level Meeting, and is now featured in Sustainable Development Goal 3 in the form of reducing premature mortality from NCDs by one-third before 2030. Cardiovascular diseases (CVDs) are the leading cause of deaths from NCDs (ie, 48% of all NCDs deaths). Therefore, substantial reductions in CVDs will have a major impact on reducing the overall burden of NCDs globally. The good news is that most CVDs can be prevented by addressing the key underlying behavioural risk factors, such as physical inactivity, unhealthy diet, tobacco use, and harmful use of alcohol, through population-wide approaches. Among individuals with or at high risk of CVD, early detection and effective management with appropriate counselling and medicines can reduce cardiovascular deaths substantially.
The importance of effective treatment for CVD has been recognised in the Global NCD Action Plan 2013–20, for which one of the nine global targets is that at least 50% of eligible individuals should receive drug therapy and counselling to prevent heart attacks and strokes by 2025.5 Although admirable, this is a hard target to achieve given that secondary prevention strategies in LMICs are often unaffordable or unavailable.
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Antimicrobial resistance (AMR) and malaria remain significant public health challenges in the WHO Eastern Mediterranean Region (EMR). In 2021, the region reported 1.7 million sepsis-related deaths, with 373,000 associated with bacterial AMR. High antibiotic consumption, particularly in high-income c...ountries, combined with rising usage in middle-income countries, has accelerated the emergence of drug-resistant infections. Malaria management is further complicated by biological threats, including vector insecticide resistance, PFHRP2/3 gene deletions, and antimalarial drug resistance, alongside insufficient trained personnel and limited molecular surveillance capacity. Effective strategies to address these challenges include strengthening regional and cross-border surveillance networks, designating WHO collaborating centers for molecular monitoring, enforcing national treatment policies, and raising public and healthcare provider awareness about rational antimalarial and antibiotic use. These measures, coupled with sustainable funding and enhanced therapeutic efficacy studies, are essential to reduce the development and spread of drug-resistant malaria and improve overall health outcomes in the EMR.
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Cardiovascular disease is a major cause of disability and premature death throughout the world, and contributes substantially to the escalating costs of health care. The underlying pathology is atherosclerosis, which develops over many years and is usually advanced by the time symptoms occur, genera...lly in middle age. Acute coronary and cerebrovascular events frequently occur suddenly, and are often fatal before medical care can be given. Modification of risk factors has been shown to reduce mortality and morbidity in people with diagnosed or undiagnosed cardiovascular disease.
This publication provides guidance on reducing disability and premature deaths from coronary heart disease, cerebrovascular disease and peripheral vascular disease in people at high risk, who have not yet experienced a cardiovascular event. People with established cardiovascular disease are at very high risk of recurrent events and are not the subject of these guidelines. They have been addressed in previous WHO guidelines.
Several forms of therapy can prevent coronary, cerebral and peripheral vascular events. Decisions about whether to initiate specific preventive action, and with what degree of intensity, should be guided by estimation of the risk of any such vascular event. The risk prediction charts that accompany these guidelinesb allow treatment to be targeted accord-
ing to simple predictions of absolute cardiovascular risk.
Recommendations are made for management of major cardiovascular risk factors through changes in lifestyle and prophylactic drug therapies. The guidelines provide a framework for the development of national guidance on prevention of cardiovascular disease that takes into account the particular political, economic, social and medical circumstances.
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Malaria and HIV, two of the world’s most deadly diseases, are widespread, but their distribution overlaps greatly in sub-Saharan Africa. Consequently, malaria and HIV coinfection (MHC) is common in the region. In this paper, pertinent publications on the prevalence, impact, and treatment strategie...s of MHC obtained by searching major electronic databases (PubMed, PubMed Central, Google Scholar, ScienceDirect, and Scopus) were reviewed, and it was found that the prevalence of MHC in SSA was 0.7%–47.5% overall. Prevalence was 0.7%–47.5% in nonpregnant adults, 1.2%–27.8% in children, and 0.94%–37% in pregnant women. MHC was associated with an increased frequency of clinical parasitemia and severe malaria, increased parasite and viral load, and impaired immunity to malaria in nonpregnant adults, children, and pregnant women, increased in placental malaria and related outcomes in pregnant women, and impaired antimalarial drug efficacy in nonpregnant adults and pregnant women. Although a few cases of adverse events have been reported in coinfected patients receiving antimalarial and antiretroviral drugs concurrently, available data are very limited and have not prompted major revision in treatment guidelines for both diseases. Artemisinin-based combination therapy and cotrimoxazole are currently the recommended drugs for treatment and prevention of malaria in HIV-infected children and adults. However, concurrent administration of cotrimoxazole and sulfadoxine–pyrimethamine in HIV-infected pregnant women is not recommended, because of high risk of sulfonamide toxicity. Further research is needed to enhance our understanding of the impact of malaria on HIV, drug–drug interactions in patients receiving antimalarials and antiretroviral drugs concomitantly, and the development of newer, safer, and more cost-effective drugs and vaccines to prevent malaria in HIV-infected pregnant women.
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WHO MiNDbank is an online platform bringing together country and international resources, covering mental health, substance abuse, disability, general health, human rights and development. It is part of WHO’s QualityRights campaign to end violations against people with mental disabilities. MiNDban...k aims to facilitate dialogue, advocacy and research, to promote reform in these areas in line with international human rights and best practice standards.
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Antimicrobial resistance (AMR) has emerged as a major public health problem all over the world. Infections caused by resistant microbes fail to respond to treatment, resulting in prolonged illness and greater risk of death. This document focuses on the mechanism to develop a practically applicable h...ospital antibiotic policy and standard treatment guidelines (STG). In addition, the document contains information on various effective strategies for implementation of STG. It also discusses various activities and information required for the development of the antibiogram, antibiotic policy and standard treatment guidelines, such as surveillance programmes, the cause and controlling strategies for AMR and HAI; performance measures of antibiogram, antibiotic policy and standard treatment guidelines. A model hospital STG for community-acquired pneumonia in adults is included.
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This report presents an analysis of antibacterial agents in preclinical (third annual review) and clinical (fifth annual review) development. The analysis covers traditional (direct-acting small molecules) and non-traditional antibacterial agents in development worldwide. It evaluates to what extent... the present pipeline addresses infections caused by WHO Priority Pathogens, Mycobacterium tuberculosis and Clostridioides difficile. The report also provides an assessment of the traditional agents with respect to whether they meet a set of predefined criteria for innovation, namely absence of known cross-resistance, new target, mode of action and/or class. It also includes an overview of the agents that obtained authorization since 1 July 2017.
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The World Health Organization was requested by Member States to develop a global priority pathogens list (global PPL) of antibiotic-resistant bacteria to help in prioritizing the research and development (R&D) of new and effective antibiotic treatments. To date, the selection of pathogens for R&D ac...tivities has been largely guided by small and large pharmaceutical companies according to a variety of parameters, such as perceived/unmet medical need, pressure of investors, market size, scientific discovery potential, and availability of specific technologies. Previous PPLs, issued by the Centers for Disease Control and Prevention.
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The document is a summary report by the World Health Organization (WHO) Regional Office for the Eastern Mediterranean, focusing on a capacity-building workshop held in Abu Dhabi in 2019. The workshop addressed the management and care of substance use disorders, aiming to improve technical and manage...rial capacities in areas such as policy development, treatment services, prevention, monitoring, and international collaboration. Participants included representatives from 12 countries, WHO collaborating centers, and other UN agencies.
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The WHO Model List of Essential Medicines and Model List of Essential Medicines for Children are updated and published every two years, intended as a guide for countries or regional authorities to adopt or adapt in accordance with local priorities and treatment guidelines for the development and upd...ating of national essential medicines lists. Selection of a limited number of essential medicines as essential, taking into consideration national disease burden and clinical need can lead to improved access through streamlined procurement and distribution of quality-assured medicines, support more rational or appropriate prescribing and use and lower costs for both health care systems and for patients.
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The SAMHSA-HRSA Center for Integrated Health Solutions (CIHS) promotes the development of integrated primary and behavioral health services to better address the needs of individuals with mental health and substance use conditions, whether seen in specialty behavioral health or primary care provider... settings. CIHS is funded jointly by the Substance Abuse and Mental Health Services Administration(SAMHSA) and the Health Resources and Services Administration (HRSA), and run by the National Council for Behavioral Health.
Despite the high prevalence of mental health and substance use problems, too many Americans go without treatment — in part because their disorders go undiagnosed. Regular screenings in primary care and other healthcare settings enables earlier identification of mental health and substance use disorders, which translates into earlier care. Screenings should be provided to people of all ages, even the young and the elderly
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