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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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."
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Infection prevention and control measures for Ebola virus disease
Immunizations are an essential health service that protect susceptible individuals from vaccine-preventable diseases (VPD).2 By providing timely immunizations, individuals and communities remain protected and the likelihood of a VPD outbreak decreases
This publication is available in Arabic, Chines...e, English, French, Russian and Spanish
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This document aims to describe a minimum set of surveillance activities recommended at the national level to detect and monitor the relative prevalence of SARS-CoV-2 variants and outline a set of activities for the characterization and assessment of risk posed by these variants. A set of indicators ...is also provided to standardize monitoring and public reporting of variant circulation.
The document is primarily intended for national and sub-national public health authorities and partners who support implementation of surveillance for SARS-CoV-2 variants
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This fourth WHO report on neglected tropical diseases (NTDs) reviews the progress made towards achieving the Roadmap targets for 2020, noting the remaining challenges, then looks beyond 2020 to evaluate the changing global health and development landscape, considering the implications of integrating... these diseases into the broader 2030 Agenda for Sustainable Development.
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THE SYRIAN ARAB REPUBLIC, IRAQ, JORDAN, LEBANON, TURKEY, WEST BANK AND GAZA STRIP, EGYPT
This document offers suggested risk communication actions in relation to Zika virus infection and other health issues linked to this disease. It is directed toward ministers of health and other health sector actors who, with their national (multidisciplinary) teams for communication and social mobil...ization, will be able to adapt the provided information to the needs of their countries and audiences.
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doi: 10.9745/GHSP-D-16-00226; Glob Health Sci Pract December 23, 2016 vol. 4 no. 4 p. 626-646
2nd edition. The Event-based Surveillance Framework is intended to be used by authorities and agencies responsible for surveillance and response. This framework serves as an outline to guide stakeholders interested in implementing event-based surveillance (EBS) using a multisectoral, One Health appr...oach. You can download the Training Manual and Framework in Arabic, English, French, and Portuguese
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PLOS ONE | www.plosone.org
September 2014 | Volume 9 | Issue 9 | e103657
Early warning systems for disease outbreaks are surveillance systems that collect information on a selected list of epidemic-prone diseases in order to trigger prompt public health interventions. They function in humanitarian emergency situations when the routine public health surveillance systems o...f a country are underperforming, disrupted or non-existent. Early warning systems are often set up to fill such temporary gaps, while the routine systems recover from the effects of the disaster or a crisis. During humanitarian emergencies, detecting and responding swiftly to epidemics is key in order to reduce unecessary illness and death, especially among refugees and displaced people.
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