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).
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Available in English, Spanish and Portuguese
Download these technical notes directly from the website: These four-page illustrated notes, originally prepared in 2011 and updated in 2013, provide practical, evidence-based recommendations in responding to immediate and medium-term water, sanitation and hygiene needs of populations affected by e...mergencies.
The notes are relevant to a wide range or emergency situations, including both natural and conflict-induced disasters. They are suitable for field technicians, engineers and hygiene promotors, as well as staff from agency headquarters.
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Available in Englisch, Spanish and Portuguese
This document provides information and recommendations for action, based on the current available knowledge around monkeypox. It is a first draft which will be updated in light of evolving evidence and additional information as they become available.
Workplaces outside of healthcare facilities can be also settings for transmission of COVID-19. Outbreaks of COVID-19 has been reported in various types of workplaces and job categories.
All workers should be protected from acquiring COVID-19 because of their work. The prevention of COVID-19 in ...work settings should be combined with measures for protecting physical and mental health, safety and wellbeing of workers from other occupational hazards in the operation, closures and reopening of workplaces.
This joint WHO/ILO policy brief provides a summary of the evidence for transmission of COVID-19 in general workplaces and an overview of WHO and ILO recommendations for prevention and mitigation of COVID-19 and for protecting health and safety at work in the context of the pandemic.
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A practical handbook covering the architecture, engineering, design and operation of prisons. It is intended for all ICRC delegates working in places of detention, whether they have extensive practical experience or are new to the field.
This Checklist is to minimize healthcare provider exposure when operating on COVID+ or suspected patient.
A septic tank takes raw sewage in, allows the solids to settle (sludge) and allows the remaining liquid to flow into the surrounding soil by means of a soakaway. Scum on the surface is also prevented from leaving the tank. Microorganisms in the anaerobic environment in the tank digest the sludge and... scum. The system consists of several stages, supply to the tank, the tank itself and the soak field.
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Technical Note: Cholera treatment facilities provide inpatient care for cholera patients during outbreaks. Proper case management and isolation of cholera patients is essential to prevent deaths and help control the spread of
the disease. Traditionally, these structures have been referred to as ch...olera treatment centres (CTCs) and
cholera treatment units (CTUs). CTCs are usually large structures set up at central level (e.g. urban areas),
while CTUs are smaller structures set up in the periphery (e.g. peri-urban or rural areas). CTCs/CTUs can
be set up as independent structures in tents or within existing buildings or wards of health structures.
Whatever the structure, the principles described in this document should be respected
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