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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Cet article fait partie d’une série de notes explicatives sur la mise au point et la distribution de vaccins.
How much protection does the current batch of COVID-19 vaccines provide us? Would you need a booster shot for new variants? What does science and evidence tell us about mass gatherings and the spread of COVID-19?
WHO’s Chief Scientist Dr Soumya Swaminathan explains in Science in 5 this week.
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.
n light of the potential risk posed by SARS-CoV-2 variants, in January 2021 WHO organized an ad hoc consultation to discuss the development of an R&D agenda in response to existing and emerging SARS-CoV-2 variants.
The key objectives were to identify the critical research questions related to var...iants and agree on a research approach to address them. Six breakout groups covered a range of specific issues related to COVID-19 variants: Epidemiology and mathematical modelling; evolutionary biology; animal models; assays and diagnostics; clinical management and therapeutics; and vaccines.
This report is a summary of presentations and panel discussions.
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The NY Times variant tracker is perhaps the most accessible and relevant publication for non-molecular biologists and the general public
Each coronavirus contains nearly 30,000 letters of RNA. This genetic information allows the virus to infect cells and hijack them to make new viruses.
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
What are the variants circulating at this time? How are variants classified as variants of interest or concern? What does this mean for the public? Dr Maria Van Kerkhove explains in Science in 5 this week.
As new variants emerge people are wondering if they should wait until a more efficacious vaccine is available or if they should go ahead and get vaccinated now? Answering your questions on COVID-19 vaccines and variants in this episode of Science in 5 is WHO's Dr Soumya Swaminathan.
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.
Available in English, French, Chinese, Arabic, Russian
8 February 2021
Declarations of interests were collected from all external contributors and assessed for any conflicts of interest. Summaries of the reported interests can be found on the SAGE meeting website and SAGE Covid-19 Working Group webpage. This guidance should be considered along with the broader COVID-...19 policy advice to WHO member states and in particular the advice on how to reach the COVID-19 vaccination targets.
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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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