The WHO continuously reviews available data on SARS-CoV-2 variants of concern. For this version, the global epidemiological
situation of the COVID-19 pandemic as of 21 January 2022 – at a time when the Omicron VOC had been identified in 171
countries across all six WHO Regions and was rapidly re...placing Delta worldwide – was considered Omicron has a substantial growth advantage, higher secondary attack rates and a higher observed reproduction number than Delta.
There is now significant evidence that immune evasion contributes to the rapid spread of Omicron. Other factors may be a shorter
serial interval (by about 0.8 to 1.2 days compared to Delta) and potential increased intrinsic transmission fitness . There is
growing evidence that with Omicron, there is lower vaccine effectiveness (VE) against infection and symptomatic disease soon after vaccination compared to Delta. There is also evidence of accelerated waning of VE over time of the primary series against infection and symptomatic disease for the studied vaccines. Further studies are required to better understand the drivers of transmission and declining incidence in various settings. These factors include the intrinsic transmission fitness properties of the virus, degree of immune evasion, vaccination coverage and level of vaccine-derived and post-infection immunity, levels of social mixing and degree of application of public health and social measures (PHSM).
more
Nigeria reported its first case of COVID-19 at the end of February 2020 and subsequently experienced
four waves, with peaks in June 2020 and January, August and December 2021. The COVID-19 pandemic
severely impacted the economy of Nigeria and caused disruption of health services nationwide. During... the crisis, many Nigerians failed to access routine health
services due to decreased income and lockdown
restrictions. The most significant service disruptions
were in maternal and newborn health, vaccination,
sick childcare, family planning and noncommunicable
disease treatment services (1). Pregnant women
were anxious about contracting COVID-19 during
2020, and as a result, many avoided attending health
facilities for antenatal (ANC) and postnatal care (PNC).
Disruptions in the medical supply chain and diversion
of resources to COVID-19 management impacted on
essential health services. Health workers were often
unable to go to work because of transport disruptions
or illness
more
Rabies has an enormous impact on both agriculture and conservation biology, but its greatest burden is undeniably on public health. As such, routine methods for rapid risk assessment after human exposures to rabies as well as applications for laboratory-based surveillance, production of biologicals ...and management of this infectious disease are critical. Given its mandate to improve human health and control disease among its Member States, WHO has led the production of this fifth edition of Laboratory techniques in rabies.
more
This topic brief highlights how nutrition and healthy diets support the achievement of education and learning objectives, and explains how intervention benefits can be amplified with a whole-school and systems approach. The recommended actions are informed by the Global Standards for health-promotin...g schools. This evidence-informed resource is intended for national education, health and associated sectors to support the strengthening of national school health programmes.
more
Reducing the global suicide mortality rate by a third by 2030 is a target of both the UN Sustainable Development Goals and the WHO Global Mental Health Action Plan. However, an impediment to meeting this goal is the fact that suicide and suicide attempts remain illegal in at least 23 countries world...wide. Decriminalization of suicide and suicide attempts represents one critical step governments can take in their efforts to prevent suicide. The WHO Policy Brief on the health aspects of decriminalization of suicide and suicide attempts cites data and research to make a case for decriminalizing suicide globally. It also includes case examples from countries that have recently decriminalized suicide and suicide attempts — Guyana and Pakistan, Singapore,— providing important insights to policy-makers, legislators, parliamentarians and other decision-makers.
more
Zimbabwe has, over the years, grappled with the repercussions of the climate crisis, which have led to erratic rainfall patterns characterized by either severe floods or prolonged periods of drought. The nation has experienced a concerning trend of numerous regions reporting rainfall levels below th...e usual during what should be "normal" years. The upcoming El Niño event forecasted for 2023-2024, which is associated with drier-than-average rainfall, is poised to exacerbate this predicament. It is expected to intensify aridity, significantly impacting food and animal production across many areas, including those typically classified as "dry regions."
more
Background
Noncommunicable diseases are major contributors to morbidity and mortality worldwide. Modifying the risk factors for these conditions, such as physical inactivity, is thus essential. Addressing the context or circumstances in which physical activity occurs may promote physical activity a...t a population level. We assessed the effects of infrastructure, policy or regulatory interventions for increasing physical activity.
Methods
We searched PubMed, Embase and clinicaltrials.gov to identify randomised controlled trials (RCTs), controlled before-after (CBAs) studies, and interrupted time series (ITS) studies assessing population-level infrastructure or policy and regulatory interventions to increase physical activity. We were interested in the effects of these interventions on physical activity, body weight and related measures, blood pressure, and CVD and type 2 diabetes morbidity and mortality, and on other secondary outcomes. Screening and data extraction was done in duplicate, with risk of bias was using an adapted Cochrane risk of bias tool. Due to high levels of heterogeneity, we synthesised the evidence based on effect direction.
Results
We included 33 studies, mostly conducted in high-income countries. Of these, 13 assessed infrastructure changes to green or other spaces to promote physical activity and 18 infrastructure changes to promote active transport. The effects of identified interventions on physical activity, body weight and blood pressure varied across studies (very low certainty evidence); thus, we remain very uncertain about the effects of these interventions. Two studies assessed the effects of policy and regulatory interventions; one provided free access to physical activity facilities and showed that it may have beneficial effects on physical activity (low certainty evidence). The other provided free bus travel for youth, with intervention effects varying across studies (very low certainty evidence).
Conclusions
Evidence from 33 studies assessing infrastructure, policy and regulatory interventions for increasing physical activity showed varying results. The certainty of the evidence was mostly very low, due to study designs included and inconsistent findings between studies. Despite this drawback, the evidence indicates that providing access to physical activity facilities may be beneficial; however this finding is based on only one study. Implementation of these interventions requires full consideration of contextual factors, especially in low resource settings.
more
Objective: To identify gaps in national stroke guidelines that could be bridged to enhance the quality of stroke care services in low- and
middle-income countries.
Methods: We systematically searched medical databases and websites of medical societies and contacted international organizations.
Co...untry-specific guidelines on care and control of stroke in any language published from 2010 to 2020 were eligible for inclusion. We reviewed
each included guideline for coverage of four key components of stroke services (surveillance, prevention, acute care and rehabilitation).
We also assessed compliance with the eight Institute of Medicine standards for clinical practice guidelines, the ease of implementation of
guidelines and plans for dissemination to target audiences.
Findings: We reviewed 108 eligible guidelines from 47 countries, including four low-income, 24 middle-income and 19 high-income countries.
Globally, fewer of the guidelines covered primary stroke prevention compared with other components of care, with none recommending
surveillance. Guidelines on stroke in low- and middle-income countries fell short of the required standards for guideline development;
breadth of target audience; coverage of the four components of stroke services; and adaptation to socioeconomic context. Fewer low- and
middle-income country guidelines demonstrated transparency than those from high-income countries. Less than a quarter of guidelines
encompassed detailed implementation plans and socioeconomic considerations.
Conclusion: Guidelines on stroke in low- and middle-income countries need to be developed in conjunction with a wider category of
health-care providers and stakeholders, with a full spectrum of translatable, context-appropriate interventions.
more
Unmet mental health needs in the Region of the Americas are a leading source of morbidity and mortality, which result in tremendous health, social, and economic consequences. The COVID-19 pandemic has exacerbated the mental health crisis in the Region, necessitating urgent action at the highest leve...ls of government and across sectors to build back better mental health now and for the future. This landmark report is the result of the PAHO High-Level Commission on Mental Health and COVID-19. It provides an analysis of the mental health situation in the Region, followed by a series of recommendations and corresponding actions to support countries in the Americas to prioritize and advance mental health using human rights- and equity-based approaches.
more
There is increasing interest in understanding the role of air pollution as one of the greatest threats to human health worldwide. Nine of 10 individuals breathe air with polluted compounds that have a great impact on lung tissue. The nature of the relationship is complex, and new or updated data are... constantly being reported in the literature. The goal of our review was to summarize the most important air pollutants and their impact on the main respiratory diseases (chronic obstructive pulmonary disease, asthma, lung cancer, idiopathic pulmonary fibrosis, respiratory infections, bronchiectasis, tuberculosis) to reduce both short- and the long-term exposure consequences. We considered the most important air pollutants, including sulfur dioxide, nitrogen dioxide, carbon monoxide, volatile organic compounds, ozone, particulate matter and biomass smoke, and observed their impact on pulmonary pathologies. We focused on respiratory pathologies, because air pollution potentiates the increase in respiratory diseases, and the evidence that air pollutants have a detrimental effect is growing. It is imperative to constantly improve policy initiatives on air quality in both high- and low-income countries.
more
Based on an increasing body of evidence pointing at the positive impact that social assistance has had in Malawi, the region and beyond, government is encouraged to continue investing in and supporting the expansion and comprehensiveness of social protection programmes in both rural and urban areas,... ensuring they effectively target and adequately address needs and vulnerabilities across the lifecycle, in line with the Malawi National Social Support Programme (MNSSP II) and Vision 2063. In addition, Government and Development Partners are encouraged to further the integration between social protection, the humanitarian and the disaster risk management sectors in response to shocks and stresses, through the roll out of a fully shock-sensitive social protection system.
more
En los últimos decenios se han logrado avances significativos en el control de la esquistosomiasis así como de las geohelmintiasis, y la OMS ha trazado una hoja de ruta para guiar la aplicación de las políticas y las estrategias planteadas en Accelerating work to overcome the global impact of ne...glected tropical diseases
more
Rev Mex Patol Clin Med Lab 2020; 67 (2): 93-112: La tuberculosis (TB) es en la actualidad la patología de tipo infeccioso que causa mayor número de muertes alrededor del mundo cada año. La percepción acerca de esta entidad ha cambiado a lo largo del tiempo, ya que se consideraba que se relaciona...ba con la pobreza y las consecuencias de la misma como desnutrición, hacinamiento y promiscuidad; sin embargo, en los últimos 40 años con la aparición de la infección del virus de la inmunodeficiencia humana (VIH) los casos comenzaron a incrementarse, además de la aparición de nuevas sepas multirresistentes a la terapéutica convencional, lo que indudablemente ha provocado la reemergencia de esta entidad así como la potencialización en su letalidad.
more
Parasite Epidemiology and Control Volume 27, November 2024, e00380
The planning and implementation of intervention measures against schistosomiasis, particularly mass administration, require knowledge of the current status of the infection. This is important for monitoring the impact of the interve...ntion on disease indicators such as a decline in infection prevalence, intensity of infection, and urogenital morbidities. Following repeated rounds of mass treatment in northwestern Tanzania, the epidemiology of urogenital schistosomiasis has changed; thus, for the effective planning and allocation of resources, it is important to understand the current status of the disease in the targeted groups
more
Le nombre de cas de COVID-19 augmente à nouveau, l’Afrique du Sud comptant pour près de la moitié de tous les cas confirmés de la Région africaine de l’OMS. La menace de nouveaux variants plane, et la faible couverture vaccinale soulève des questions concernant les mesures qui devront êtr...e prises pour lutter contre la COVID-19. Dans la plupart des pays d’Afrique subsaharienne, la prévention reste la stratégie clé. Dans ce document, cinq centres nationaux de la plateforme de l’Observatoire africain de la santé sur les systèmes et politiques de santé (AHOP), basés en Éthiopie, au Kenya, au Nigéria, au Rwanda et au Sénégal analysent les leçons à tirer de leurs mesures d’endiguement respectives lors despremières phases de la pandémie.
more