Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall...y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
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Trachoma is the leading infectious cause of blindness worldwide. In April 2023, it was a public health problem
in approximately 40 countries, with an estimated 116 million people at risk and 1.5 million people affected
by the late blinding stage of the disease (1). About 84% of those at risk of tr...achoma are in the World Health
Organization (WHO)’s African Region; about 52% of those at risk of trachoma live in Ethiopia
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The African Regional Convening of the Global Initiative to Support Parents (GISP) stimulated the interest or engagement of almost 1500 individuals from 742 unique organizations in the fields of health, education, social welfare, women’s affairs, early childhood, water and sanitation, mental health..., violence prevention, innovative finance, climate, and many others. The convening united representatives across governments, civil society organizations, programme implementers, philanthropies, multilateral organizations, bilateral funders, private companies, universities, schools and day care centres, and hospitals around the common cause of supporting parents and caregivers.
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This document is based on currently available scientific evidence on treatment for drug use disorders and sets out a framework for the implementation of the Standards, in line with principles of public health care. The Standards identify major components and features of effective systems for the tre...atment of drug use disorders. They describe treatment modalities and interventions to match the needs of people at different stages and severities of drug use disorders, in a manner consistent with the treatment of any chronic disease or health condition. The Standards are aspirational, and such, national or local treatment services or systems need not attempt to meet all the standards and recommendations made in this document all at once. However over time, progressive quality improvement, with ‘evidence-based and ethical practice’ as an objective, can and should be expected to achieve better organized, more effective and ethical systems and services for people with drug use disorders.
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The thirty-seventh meeting of the Programme, Budget and Administration Committee was held in Geneva from 25 to 27 January 2023 and chaired by Ms Aishath Rishmee (Maldives). The Committee adopted its agenda and agreed its programme of work. In his opening remarks, the Director-General emphasized the ...crucial work on the financial future of the Organization, most significantly implementation of the Programme budget 2022−2023 and development of the Proposed programme budget 2024−2025, which would be the first to benefit from the agreed increase in assessed contributions. He welcomed the work of the Agile Member States Task Group on Strengthening WHO’s Budgetary, Programmatic and Financing Governance with its recommendations for long-term improvements in reform, prevention of and response to sexual abuse and harassment, new web-based information portals and a new replenishment process for consideration by Member States. Efforts were also under way to improve impact at country level, and he would continue to report to Member States on progress. He was heading an agile, proactive and fast-responding WHO, committed to implementing plans approved by Member States.
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9 March 2022, Timely and accurate diagnostic testing for SARS-CoV-2 is an essential part of a comprehensive COVID-19 response strategy. Ag-RDTs can be performed by individuals in which they collect their own specimen, perform a simple rapid test and interpret their test result themselves at a time a...nd place of their choosing, termed COVID-19 self-testing. This interim guidance provides a new recommendation that COVID-19 self-testing, using SARS-CoV-2 Ag-RDTs, should be offered as part of SARS-CoV-2 testing services. It also includes implementation considerations that can guide decisions on whether, and how, to adopt self-testing in different contexts, including the populations being prioritized; the disease prevalence in that population; and the impact on accessibility of testing, health care services and result reporting.
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8 January 2021
Sequencing enabled the world to rapidly identify SARS-CoV-2 and develop diagnostic tests and other tools for outbreak management. Continued genome sequencing supports the monitoring of the disease’s spread and evolution of the virus. Accelerated integration of genome sequencing int...o the practices of the global health community is required if we want to be better prepared for the future threats. This document provides guidance for laboratories on maximizing the impact of SARS-CoV-2 sequencing now and other emerging pathogens in the future.
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28 May 2021
Contact tracing is a key component of a public health response to infectious disease outbreaks. The purpose of this guidance is to reinforce the place of community engagement and participation in the contact tracing process. The guidance and related products articulate best practice pri...nciples for community engagement and how they can be operationalized as part of any community-centred contact tracing strategy. The material provided can stand on its own or be used to complement other documents that support strategies, implementation plans or training and capacity building modules.
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The present book deals not only with emergency response, but also with measures designed to reduce the impact of disasters on environmental health infrastructure, such as water supply and sanitation facilities. It also aims to strengthen the ability of people to withstand the disruption of their acc...ustomed infrastructure and systems for environmental health (e.g. shelter, water supply, sanitation, vector control etc.) and to recover rapidly.
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Advances in the treatment of pediatric cancer have made it possible to expand initiatives beyond cure and cover aspects such as early detection, continuity of treatment and reduction in toxicity. All this has paved the way for a more comprehensive vision of patient care, which means better chances o...f healing and a fuller life - objectives of the World Initiative against Childhood Cancer. Within this comprehensive care, psychosocial care includes the social, psychological, spiritual and functional dimensions of the disease process of patients. This series includes guidelines and standards based on evidence that guarantee the quality of said care. The standards are the result of discussion and review by different professionals from Latin America and the Caribbean. Module 1 focuses on psychosocial evaluation as a strategy to support the objectives of the World Initiative against Childhood Cancer, and as a tool for health professionals to gather the necessary information to offer these patients a comprehensive approach focused on well-being, adaptation to the disease process, and adherence to treatment.
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Traditional food markets play important economic, cultural, and social role and are sources of livelihood for millions of people in urban and rural areas. The manual Five keys for safer traditional food markets: risk mitigation in traditional food markets in the Asia-Pacific Region aims to support a...nd guide local authorities, market community, and consumers to transform these markets into safer and healthier places through practical risk mitigation measures and community engagement strategies. The manual provides guidance on the implementation of five keys to promote public health and safety, particularly, in the context of food safety, zoonoses diseases, and infectious respiratory diseases.
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This updated version, endorsed by the World Health Assembly in May 2021 through resolution WHA74.9, reflects lessons learned in the global malaria response over the last 5 years. While the milestones and targets remain the same, the approaches to tackling the disease, in some areas, have evolved to ...keep pace with the changing malaria landscape.
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In 2015, 26% of the deaths of 5.9 million children who died before reaching their fifth birthday could have been prevented
through addressing environmental risks – a shocking missed opportunity. The prenatal and early childhood period represents
a window of particular vulnerability, where enviro...nmental hazards can lead to premature birth and other complications,
and increase lifelong disease risk including for respiratory disorders, cardiovascular disease and cancers. The environment
thus represents a major factor in children’s health, as well as a major opportunity for improvement, with effects seen in every
region of the world.
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The Leprosy Programme and Transmission Assessment (LPTA) is an activity that is carried out by internal teams towards the end of Phase 1 (see Leprosy Elimination Framework in the Annex) when a subnational jurisdiction (typically second-tier) reaches the milestone for interruption of transmission, i....e., zero autochthonous child cases for a consecutive period of five years. It also needs to be done at the end of Phase 2, when the second milestone of elimination of leprosy disease has been reached. An LPTA will be carried out to document that all relevant programme criteria have been met and examine trends of epidemiological indicators in such jurisdiction to confirm that the milestone has been achieved. The LPTA includes assessment of health facilities that provide leprosy services. LPTA comprises of review of epidemiological data, health facility assessment and data validation and verification of the programme criteria through observation during a field visit. The evidence collected in this way in subnational health administrative units is compiled in a Leprosy Elimination Dossier to be submitted to WHO when the country reaches the milestone for elimination of disease in the country as whole. Countries that have not detected any new leprosy cases in the past three years or more can use the LPTA at national level prior to or as part of the verification process. Countries likely to be among the first to apply for verification may have had no new cases detected for more than 10 years.
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Disinfection of drinking-water supplies has been one of the most significant public health advancements of the last century with respect to reducing waterborne disease.
Although chlorine has been used as the disinfectant of choice for public drinking-water supplies for the past century, a numbe...r of emerging or alternative compounds are used or are being considered for the disinfection of drinking-water.
This series reviews the state of the knowledge on the application, efficacy and toxicity of bromine, iodine and silver as drinking-water disinfectants.
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This brief advocacy document highlights the burden, risks and prevention of injuries and violence, which took the lives of 4.4 million people in 2019 and constitute 8% of all deaths. Among the injury-related causes of death include road traffic crashes, drowning, falls, burns, poisoning and violence... against oneself or others. For people age 5-29 years, three of the top five causes of death are injury-related, including road traffic injuries, homicide, and suicide. Injuries and violence are not evenly distributed across or within countries – some people are more vulnerable than others depending on the conditions in which they are born, grow, work, live and age; in general, being young, male and of low socioeconomic status all increase the risk of injury. This document, aimed at public health professionals; injury prevention researchers, practitioners and advocates; and donors, draws attention to specific strategies based on sound scientific evidence that are effective and cost-effective at preventing injuries and violence; it is critical that these strategies are more widely implemented.
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The World Health Organization (WHO) and United NationsHuman Settlements Programme (UN-HABITAT) joint globalreport, Hidden cities: unmasking and overcoming healthinequities in urban settings, exposes the extent to whichcertain city dwellers suffer disproportionately from a wide range of diseases and ...health problems. This report provides information and tools to helpgovernments and local leaders reduce health inequities in their cities. The objective of the report is not tocompare rural and urban health inequities. Urban healthinequities need to be addressed specifically for they aredifferent in their magnitude and in their distribution.
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Interim guidance, 26 October 2021
This interim guidance has been developed on the basis of the advice issued by the Strategic Advisory Group of Experts (SAGE) on Immunization at its meeting on 5 October 2021.
SAGE said moderately and severely immunocompromised persons should be offered an addition...al dose of all WHO approved vaccines “since these individuals are less likely to respond adequately to vaccination following a standard primary vaccine series and are at high risk of severe COVID-19 disease.”
People aged 60 and older who received the Sinovac and Sinopharm vaccines should get a third dose too, the experts added, though use of other vaccines may also be considered depending on supply and access.
“When implementing this recommendation, countries should initially aim at maximizing 2-dose coverage in that population, and thereafter administer the third dose, starting in the oldest age groups”, they said.
SAGE has also reviewed a vaccine developed by Indian company Bharat Biotech and will issue a policy recommendation after WHO greenlights it for emergency use.
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The Greater Horn of Africa is experiencing one of the worst food insecurity situations in decades. It is estimated
that more than 37 million people are in Integrated Food Security Phase Classification (IPC)1 phase 3 or above and approximately 7 million children under the age of five are acutely mal...nourished in the region. While finding food and safe water is the absolute priority, the health response is essential to avert preventable disease and death.
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Notable progress has also been made on other key health indicators such as reducing maternal, infant and child deaths and malnutrition, increasing immunization coverage, eliminating infectious diseases such as polio and reducing the incidence of malaria, tuberculosis and diarrhoeal diseases.
But ...despite such substantial progress, the country now faces new and emerging new challenges such as the rising burden of noncommunicable diseases, increased risks associated with disasters, environmental threats and health emergencies during disease outbreaks including the COVID-19 pandemic that is a serious public health threat to Bangladesh. To establish a resilience system for future potential pandemics, the national capacity for emergency preparedness and early response to health emergencies needs to be bolstered considerably.
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