Weekly epidemiological update on COVID-19, 28 September 2022
21 January 2022
The overall threat posed by Omicron largely depends on four key questions: (i) how transmissible the variant is; (ii) how well vaccines and prior infection protect against infection, transmission, clinical disease and death; (iii) how virulent the variant is compared to other varian...ts; and (iv) how populations understand these dynamics, perceive risk and follow control measures, including public health and social measures (PHSM).
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What do we know about Omicron variant so far? WHO's Dr Maria Van Kerkhove updates on the transmissibility, severity, symptoms and ways to protect yourself in Science in 5.
Strengthening surveillance for Variant of Concern (VOC) Omicron (B.1.1.529): technical brief and priority actions for member states World Health Organization Headquarters, 28 November 2021
While COVID-19 virus continues to circulate and evolve, new variants are constantly emerging. Most of the current COVID-19 cases are driven by the circulation of the BA.5 subvariant of Omicron. The COVID-19 vaccines are being updated with Omicron variants to provide broader immunity against circulat...ing and emerging variants.
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How concerned should we be about the new variants of SARS CoV 2 which cause COVID-19? Is it unusual for viruses to change and mutate? Do vaccines protect against these variants and what can you do to protect yourself? WHO’s Chief Scientist Dr Soumya Swaminathan explains in Science in 5
A COVID-19 virus mutation tracker system (CovMT; appendix) based on SARS-CoV-2 isolate genomes deposited to GISAID to track the worldwide sequencing efforts and the evolution of the mutational landscape of this virus. CovMT, which is updated daily, summarises mutations from more than 450 000 isola...tes into groups of generic virus clades, lineages, and more specific mutation sets we call mutation fingerprints.
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8 February 2021
On the 9 February 2021, Africa CDC convened a special session of the Africa Task Force for COVID-19 to review existing data and evidence and recommend
Вариант вируса, названный «SARSCoV-2, вариант202012/01»,впервые был выявлен в Соединенном Королевстве, и сейчас его циркуляция подтверждена в ряде стран Европейского ре...иона ВОЗ. Он помечен как «вариант, вызывающий обеспокоенность» (VOC), поскольку, по имеющимся данным, он более активнопередается от человека к человеку.
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1 March 2021
This article is part of a series of explainers on vaccine development and distribution. Learn more about vaccines – from how they work and how they’re made to ensuring safety and equitable access – in WHO’s Vaccines Explained series.