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1
Terminology used to describe the transmission of pathogens through the air varies across scientific disciplines, organizations and the general public. While this has been the case for decades, durin
...
g the coronavirus disease (COVID-19) pandemic, the terms ‘airborne’, ‘airborne transmission’ and ‘aerosol transmission’ were used in different ways by stakeholders in different scientific disciplines, which may have contributed to misleading information and confusion about how pathogens are transmitted in human populations.
This global technical consultation report brings together viewpoints from experts spanning a range of disciplines with the key objective of seeking consensus regarding the terminology used to describe the transmission of pathogens through the air that can potentially cause infection in humans.
This consultation aimed to identify terminology that could be understood and accepted by different technical disciplines. The agreed process was to develop a consensus document that could be endorsed by global agencies and entities. Despite the complex discussions and challenges, significant progress was made during the consultation process, particularly the consensus on a set of descriptors to describe how pathogens are transmitted through the air and the related modes of transmission. WHO recognizes the important areas where consensus was not achieved and will continue to address these areas in follow-up consultations.
more
In 2007, WHO warned that infectious diseases are emerging and re-emerging at a rate that has not been seen before. The potential for infectious diseases to spread rapidly results in high morbidity
...
and mortality, causing a potential global public health treat of major concern.
Several factors are contributing to the (re)emergence of infectious diseases such as population growth, living in close contact with animals, frequent travelling, poverty, destructive ecological changes due to economic development and land use and climate change result in global warming.
Especially Africa is at a threat for (re)emerging infectious diseases due to the huge population growth (expected to reach 2.5 billion by 2050) with rapid urbanisation. Additionally, people across and beyond the continent are excessively mobile which is combined with a weak health system. Moreover, the risk of (re)emerging infectious disease is further heightened by three newly adopted continental initiatives: African Continental Free Trade Area, Free Movement of Persons and African Passport and Single African Air Transport Market.
more
This policy brief presents a summary of current evidence on vulnerability to TB and proposes interventions for equitable, person-centred, and human
...
rights-based TB prevention and care. It aligns with WHO policies and guidance on TB prevention and screening, management of TB and comorbidities, access to health care, universal health coverage, determinants of TB, TB-associated impairment and disability, social protection, as well as ethics, equity and human rights.
more
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 mi
...
llion people affected
by the late blinding stage of the disease (1). About 84% of those at risk of trachoma are in the World Health
Organization (WHO)’s African Region; about 52% of those at risk of trachoma live in Ethiopia
more
Severe bacterial infections are a leading cause of morbidity and mortality among people with advanced HIV disease, after tuberculosis and cryptococ
...
cal disease. For countries to reach the end-AIDS targets for 2030, there is a need to establish a roadmap for managing severe bacterial infections and reduce mortality. The purpose of the meeting was to
Review the current research and implementation data on the use of prophylactic antibiotics (specifically azithromycin/macrolides) as part of the AHD package of care; To review options for preventing SBIs that are in line with goals of reducing AMR; Present the current evidence on diagnostics for SBI; Discuss research gaps and implementation challenges.
more
Populations affected by emergencies are continually at risk of outbreaks of epidemic-prone diseases and other public health hazards. This operational guidance aims to guide decision-making on when
...
and how to implement and strengthen Early Warning Alert and Response (EWAR) in preparation for and response to emergencies. Each module aims to provide updated operational guidance for EWAR practices, which may be more easily understood and applied during emergencies. Through its application, this operational guidance aims to contribute to:
- earlier detection of acute public health events
- earlier and more effective response
- reduced impact of emergencies on health
- increased trust of the population in the (public) health system
- fulfilling our collective commitments to the International Health Regulations (IHR,
2005).
This guidance was developed jointly by 69 experts from more than 20 organizations from global level to country level.
more
The Updated guidelines on Management of tuberculosis in children and adolescents include new recommendations that cover diagnostic approaches for TB, shorter treatment
...
for children with non-severe drug-susceptible TB, a new option for the treatment of TB meningitis, the use of bedaquiline and delamanid in young children with multidrug- and rifampicin-resistant TB and decentralized and family-centred, integrated models of care for TB case detection and prevention in children and adolescents.
more
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 and 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.
more
Humanitarian emergencies and crises (Humanitarian emergencies and crises) are large-scale events that may result in the breakdown of health care sy
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stems and society, forced displacement, death, and physical, psychological, social and spiritual suffering on a massive scale. Current responses to Humanitarian emergencies and crises rightfully focus on saving lives, but for both ethical and medical reasons, the prevention and relief of pain, as well as other physical and psychological symptoms, social and spiritual distress, also are imperative. Therefore, palliative care, should be integrated into responses to Humanitarian emergencies and crises. The principles of humanitarianism and impartiality require that all patients receive care and should never be abandoned for any reason, even if they are dying. Thus, there is significant overlap in the principles and mission of palliative care and humanitarianism: relief of suffering; respect for the dignity of all people; support for basic needs; and accompaniment during the most difficult of times
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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 immu
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nocompromised persons should be offered an additional 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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Event-based surveillance (EBS) is defined as the organized collection, monitoring, assessment and interpretation of mainly unstructured ad hoc information regarding health events or risks, which may
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represent an acute risk to health. Both indicator-based and event-based surveillance components serve the early warning and response (EWAR) function of the public health surveillance system. The Framework for Event-based Surveillance offers guidance to public health practitioners seeking to implement EBS at each administrative level in healthier countries.
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The purpose of this guide is to provide updated clinical guidance on TB/HIV, with an emphasis on diagnostic aspects—including new techniques—as well as current treatment, while maintaining a public health approach. By compiling
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and consolidating the latest World Health Organization recommendations on the subject into a single guide, the aim is to create a reference and consultation document that is frequently used, and that unifies and standardizes the comprehensive management of TB/HIV co-infection in healthcare facilities based on the principle of “two diseases, one patient.” It also seeks to support the updating of national standards and guidelines on co-infection and to complement the coordinated work that must exist between TB and HIV prevention and control programs at all levels, within the framework of the twelve internationally recommended TB/HIV collaborative activities.
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The Plan subscribes to the goals and pillars of the WHO Global Technical Strategy against Malaria 2016-2030 (GTS), while presenting key elements to address the specific challenges of the Region.
The document provides guidance and tools for training health professionals in outbreak investigation. It explains why such training is essential, o
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utlines the methodology for conducting short, practical courses, and describes how lectures, case studies, and exams are used to build skills needed for detecting, investigating, and responding to public health events. It also details how to plan, organize, and implement the training, including required resources, team roles, and evaluation procedures.
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This revised trainer's guide contains a prototype training schedule for four days. Teaching and learning strategies are highly interactive, using participatory
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and experiential approach. Training outcomes include developing skills in assessment of clients for risk factors; conduct basic screening procedures and interpreting the results; holding health education sessions on risk factor modification; promoting healthy lifestyle; and mobilizing communities. The manual is divided into six modules.
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This toolkit is a comprehensive set of practical tools and resources designed to support country-level risk communication and community engagement (RCCE) practitioners, decision-makers,
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and partners to plan and implement readiness and response activities for yellow fever outbreaks. The toolkit contains: information about yellow fever; RCCE considerations for how to approach key issues during yellow fever outbreaks; tools for understanding the context in which yellow fever outbreaks occur; methods for collecting data to inform strategy development and bring evidence into planning and implementation of activities; guidance to support vector control and immunization campaigns; and links to existing RCCE tools and training. It is one of a suite of toolkits on RCCE readiness and response to a range of disease and response areas.
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Air pollution is a major environmental risk factor and contributor to chronic, noncommunicable diseases (NCDs). However, most public health approaches to NCD
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prevention focus on behavioural and biomedical risk factors, rather than environmental risk factors such as air pollution. This article discusses the implications of such a focus. It then outlines the opportunities for those in public health and environmental science to work together across three key areas to address air pollution, NCDs and climate change: (a) acknowledging the shared drivers, including corporate determinants; (b) taking a ‘co-benefits’ approach to NCD prevention; and (c) expanding prevention research and evaluation methods through investing in systems thinking and intersectoral, cross-disciplinary collaborations.
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In 2012, all Member States of the World Health Organization (WHO) endorsed a historical target to reduce premature mortality from noncommunicable d
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iseases
(NCD). This commitment was echoed in 2015 by the United Nations Sustainable Development Goals, which included a target to reduce premature mortality (the
measure of unfulfilled life expectancy and deaths between the ages of 30 and 70 years) from NCD by 30% by the year 2030. The Sustainable Development Goals are especially relevant to cardiovascular disease (CVD), the leading cause of death globally, with increasing prevalence in low- and middle-income countries (LMIC).
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Communication Risk in Public Health Emergencies
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A WHO Guideline for Emergency Risk Communication (ERC) policy and practice.
Recent public health emergencies, such as the Ebola virus
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disease outbreak in West Africa (2014–2015), the emergence of the Zika virus syndrome in 2015–2016 and multi-country yellow fever outbreaks in Africa in 2016, have highlighted major challenges and gaps in how risk is communicated during epidemics and other health emergencies. The challenges include the rapid transformation in communications technology, including the near-universal penetration of mobile telephones, the widespread use and increasingly powerful influence of digital media which has had an impact on ‘traditional’ media (newspapers, radio and television), and major changes in how people access and trust health information. Important gaps include considerations of context – the social, economic, political and cultural factors influencing people’s perception of risk and their risk-reduction behaviours.
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About one fourth of the world’s population is estimated to have been infected with the tuberculosis (TB) bacilli, and about 5–10% of those infected develop TB
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disease in their lifetime. The risk for TB disease after infection depends on several factors, the most important being the person’s immunological status. TB preventive treatment (TPT) given to people at highest risk of progressing from TB infection to disease remains a critical element to achieve the global targets of the End TB Strategy, as reiterated by the second UN High Level Meeting on TB in 2023. Delivering TPT effectively and safely necessitates a programmatic approach to implement a comprehensive package of interventions along a cascade of care: identifying individuals at highest risk, screening for TB and ruling out TB disease, testing for TB infection, and choosing the preventive treatment option that is best suited to an individual, managing adverse events, supporting medication adherence and monitoring programmatic performance
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