On 26 November 2021, WHO designated the variant B.1.1.529 a variant of concern, named Omicron, on the advice of WHO’s Technical Advisory Group on Virus Evolution (TAG-VE). This decision was based on the evidence presented to the TAG-VE that Omicron has several mutations that may have an impact on how it behaves, for example, on how easily it spreads or the severity of illness it causes. Here ...
Since the B.1.1.529 variant was declared a Variant of Concern and assigned the name Omicron on 26 November 2021, our understanding of this variant has increased considerably, thanks to collaborative global research and the passing of time, allowing us to observe its behaviour and how it affects individuals and communities over a number of weeks.Unfortunately, as there are knowledge gaps around ...
The Omicron variant: sorting fact from myth - World Health Organization ...
Omicron is a variant of concern because it has dozens of mutations that can affect the way it behaves. Due to this mutation profile, it needs to be further investigated for its potential impacts.
Based on the currently available evidence, the overall risk related to Omicron remains very high. Omicron has a significant growth advantage over Delta, leading to rapid spread in the community with higher levels of incidence than previously seen in this pandemic. Despite a lower risk of severe disease and death following infection than previous SARS-CoV-2 variants, the very high levels of ...
Omicron appears to show preference for infecting and replicating in the upper respiratory tract, compared to Delta and other strains which prefer the lower respiratory tract.
SEAR/PR/1777New Delhi, 18 December 2021 – With seven countries in South-East Asia Region confirming cases of the new COVID-19 variant Omicron, the World Health Organization today emphasized on urgent scale up of public health and social measures to curtail its further spread. “Countries can – and must – prevent the spread of Omicron with the proven health and social measures. Our focus ...