The World Health Organization (WHO) endorses the use of population-based prevalence surveys for estimating the prevalence of trachoma. In general, the prevalence of TF in children aged 1–9 years and the prevalence of TT in adults aged ≥ 15 years are measured at the same time in any district bein...g surveyed. This was the approach of the Global Trachoma Mapping Project, which undertook baseline surveys in > 1500 districts worldwide in order to provide the data required to start interventions where needed.
The survey design recommended by WHO is a two-stage cluster random sample survey, which uses probability proportional to size sampling to select 20–30 villages, and random, systematic or quasi-random sampling to select 25–30 households in each of those villages. In most surveys, everyone aged ≥ 1 year living in selected households is examined.
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Guidance for health workers
The World Health Organization organized a Consultation of National Leprosy Programme managers, partners and affected persons to discuss the draft Global Leprosy Strategy, 2021--2030. This virtual event took place from 26 to 30 October 2020. It was attended by more than 450 stakeholders. Contribution...s were shared through 70 presentations made by stake holders from all Regions. The presentations covered the key strategic approaches: global context, challenges in countries, contact tracing and post exposure prophylaxis, disability care, interruption of transmission and elimination of disease, stigma and d iscrimination, research. In addition to numerous comments received through the chat box and by email, the conclusions and recommendations of this Consultation will guide finalizing the post 2020 Global Leprosy Strategy.
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The World Health Organization provides regional and national strategies and operational plans that aim to support countries in work to achieve measles control and elimination. These are guided by high level frameworks including the Immunization Agenda 2030 and the Measles and Rubella Strategic Frame...work 2021–2030. These frameworks promote improvements in routine immunization programmes to reach all children, reduce immunity gaps and prevent outbreaks within the context of universal health care.
This interim guidance on Targeted and selective strategies in measles and rubella vaccination campaigns adds to the suite of guidance documents. It provides expanded description of methods to determine age groups for inclusion in preventive and outbreak response measles and rubella vaccination campaigns; and operational considerations that are specific to targeted and selective strategies in measles and rubella vaccination campaigns. This guidance also updates definitions for tailored, targeted and selective campaigns.The World Health Organization provides regional and national strategies and operational plans that aim to support countries in work to achieve measles control and elimination. These are guided by high level frameworks including the Immunization Agenda 2030 and the Measles and Rubella Strategic Framework 2021–2030. These frameworks promote improvements in routine immunization programmes to reach all children, reduce immunity gaps and prevent outbreaks within the context of universal health care.
This interim guidance on Targeted and selective strategies in measles and rubella vaccination campaigns adds to the suite of guidance documents. It provides expanded description of methods to determine age groups for inclusion in preventive and outbreak response measles and rubella vaccination campaigns; and operational considerations that are specific to targeted and selective strategies in measles and rubella vaccination campaigns. This guidance also updates definitions for tailored, targeted and selective campaigns.
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Health Situation
Health policies and systems
Cooperation for Health
WHO Country Cooperation Strategic Agenda (2008-2013)
The World Health Organization (WHO) has identified mental health as an integral component of the COVID-19 response. Its rapid assessment of service delivery for mental, neurological and substance use (MNS) disorders during the COVID-19 pandemic, on which this report is based, is the first attempt to... measure the impact of the pandemic on such services at a global level. The data were collected through a web-based survey completed by mental health focal points at ministries of health between June and August 2020. The questionnaire covered the existence and funding of mental health and psychosocial support (MHPSS) plans, the presence and composition of MHPSS coordination platforms, the degree of continuation and causes of disruption of different MNS services, the approaches used to overcome these disruptions, and surveillance mechanisms and research on MNS data.
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The World Health Organization (WHO) and the global community of countries, partners, donors, technical experts, scientists and field implementation teams continue to work towards the ultimate goal of a world free of the burden of neglected tropical diseases (NTDs).
The World Health Organization's cholera fact sheet provides essential information about cholera, an acute diarrheal infection caused by ingesting food or water contaminated with Vibrio cholerae bacteria. The disease remains a global public health threat, particularly in areas lacking safe water and ...adequate sanitation. While many infected individuals exhibit mild or no symptoms, severe cases can lead to rapid dehydration and death if untreated. Prevention focuses on ensuring access to clean water, proper sanitation, and hygiene practices. Effective treatment primarily involves prompt administration of oral rehydration solutions. The fact sheet also highlights the importance of surveillance, preparedness, and response strategies to control outbreaks.
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The World Health Organization (WHO) fact sheet on Chronic Obstructive Pulmonary Disease (COPD) provides an overview of this common lung condition characterized by persistent respiratory symptoms and airflow limitation.
The World Health Organization (WHO) defines mental health as ‘a state of well-being in which the individual realizes his or her own abilities, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community’. Mental illn...ess refers to all of the diagnosable mental disorders, which are characterised by abnormalities in thinking, feelings or behaviours. Mental illness is closely related to vulnerability, both in its causes and in its effects. Globally, 14 per cent of the global burden of disease is attributed to mental illness – with 75 per cent of those affected being found in low-income countries – which includes a broad spectrum of diagnoses, from common mental illnesses such as anxiety and
substance abuse, to severe illnesses like psychosis.
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WHO's Health Alert on WhatsApp has launched a new feature to help you cope with stress during COVID-19 pandemic. Follow the short programme and learn some ways to manage stress
Access on WhatsApp
The World Health Organization's fact sheet on Chronic Obstructive Pulmonary Disease (COPD) - russian version
The World Health Organization (WHO) has developed the "Implementation Roadmap 2023–2030" to advance the Global Action Plan for the Prevention and Control of Noncommunicable Diseases (NCDs) 2013–2030. This roadmap addresses the recommendations from the mid-term evaluation of the original action p...lan. It outlines strategic directions and priority actions to assist countries in accelerating their responses to NCDs, aiming to achieve Sustainable Development Goal (SDG) target 3.4, which focuses on reducing premature mortality from NCDs by one-third by 2030.
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The World Health Organization's fact sheet on opioid overdose highlights the significant global health issue posed by opioids, which include natural, semi-synthetic, and synthetic compounds used primarily for pain management. Misuse and unsupervised use can lead to dependence and severe health probl...ems. In 2019, approximately 600,000 deaths were attributed to drug use, with nearly 80% related to opioids; about 25% of these were due to overdose. An opioid overdose is characterized by pinpoint pupils, unconsciousness, and breathing difficulties. The fact sheet emphasizes the importance of increasing access to naloxone, an opioid antagonist that can rapidly reverse overdose effects, and advocates for training individuals likely to witness an overdose in its administration. It also underscores the need for comprehensive strategies, including preventive measures, treatment for opioid dependence, and policies to reduce opioid availability.
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The World Health Organization's Eastern Mediterranean Regional Office (WHO EMRO) highlights the significant health and social consequences of harmful alcohol use. Excessive alcohol consumption is linked to over 200 diseases and injuries, including liver cirrhosis, pancreatitis, various cancers, hemo...rrhagic stroke, and hypertension. Globally, it results in approximately 3.3 million deaths annually, surpassing fatalities from HIV/AIDS, violence, or tuberculosis. In the Eastern Mediterranean Region, while overall alcohol consumption is low, there is a concerning rise among adolescents and young adults, with patterns of heavy episodic drinking posing significant health risks. In response, the WHO has developed a global strategy to reduce the harmful use of alcohol, aiming to improve health and social outcomes by decreasing disease and death associated with alcohol consumption.
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The World Health Organization's fact sheet on noncommunicable diseases (NCDs) highlights that NCDs, such as cardiovascular diseases, cancers, chronic respiratory diseases, and diabetes, are responsible for 74% of all global deaths, totaling 41 million annually. Notably, 86% of premature NCD deaths (...before age 70) occur in low- and middle-income countries. Key risk factors include tobacco use, physical inactivity, harmful alcohol consumption, unhealthy diets, and air pollution. The WHO emphasizes the importance of preventive measures, early detection, and comprehensive healthcare strategies to address the growing NCD burden.
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The World Health Organization (WHO) African Region website provides comprehensive information on cholera outbreaks across the continent. In 2024, 14 countries, including the Democratic Republic of the Congo, Ethiopia, and Nigeria, experienced significant outbreaks, with these three nations categoriz...ed as being in acute crisis.
The site offers access to Monthly Regional Cholera Bulletins, such as the May 2024 edition, which details the status of outbreaks, affected countries, and response measures.
Additionally, the website emphasizes the importance of coordinated responses to cholera outbreaks, highlighting efforts to enhance surveillance, provide medical supplies, and implement vaccination campaigns in high-risk areas.
Overall, the WHO African Region's cholera page serves as a vital resource for understanding the scope of cholera outbreaks and the ongoing initiatives to control and prevent the disease across the continent.
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The World Health Organization's Global Health Observatory (GHO) provides comprehensive data on noncommunicable diseases (NCDs), including cardiovascular diseases, cancers, chronic respiratory diseases, and diabetes. The portal offers country-specific statistics on NCD mortality rates, risk factors, ...and national responses, facilitating analysis and comparison across regions. It also includes resources such as publications and tools to support global efforts in NCD prevention and control.
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The World Health Organization (WHO) fact sheet on ambient (outdoor) air quality and health highlights the significant health risks posed by outdoor air pollution. It reports that in 2019, ambient air pollution was responsible for approximately 4.2 million premature deaths globally, primarily due to ...exposure to fine particulate matter (PM2.5), which leads to cardiovascular and respiratory diseases, as well as cancers. The fact sheet emphasizes that 99% of the global population lived in areas exceeding WHO air quality guidelines in 2019, with low- and middle-income countries bearing the highest burden. To mitigate these health impacts, WHO advocates for policies and investments that promote cleaner transportation, energy-efficient housing, improved waste management, and access to clean household energy.
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The World Health Organization (WHO) fact sheet on ambient (outdoor) air quality and health highlights the significant health risks posed by outdoor air pollution. It reports that in 2019, ambient air pollution was responsible for approximately 4.2 million premature deaths globally, primarily due to ...exposure to fine particulate matter (PM2.5), which leads to cardiovascular and respiratory diseases, as well as cancers. The fact sheet emphasizes that 99% of the global population lived in areas exceeding WHO air quality guidelines in 2019, with low- and middle-income countries bearing the highest burden. To mitigate these health impacts, WHO advocates for policies and investments that promote cleaner transportation, energy-efficient housing, improved waste management, and access to clean household energy.
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