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The term variant of concern (VOC) for SARS-CoV-2, which causes COVID-19, is a category used for variants of the virus where mutations in their spike protein receptor binding domain (RBD) substantially increase binding affinity (e.g., N501Y) in RBD-hACE2 complex (genetic data), while also being linked to rapid spread in human populations ...
The Omicron variant features as such for the first time in the overview of WHO's weekly operational update, namely "Supporting Omicron variant detection and COVID-19 response in southern Africa." As of 2 December, Botswana and South Africa have reported 19 and 172 Omicron variant cases, respectively, accounting for 62% of global cases.
The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2]
The COVID-19 pandemic was the third leading cause of death globally in 2020 and the second in 2021, according to a recent World Health Organization report.The almost 13 million lives lost during ...
In week 8, the variant was found to have a dominant share of 56.4% (758/1345) according to the interpretable results of a weekly genome sequencing survey comprising 0.9% of all COVID-19 positive tests, or 59.5% according to a variant-specific RT-PCR survey testing 54% of all the COVID-19 positive tests. [124]
The summer surge of the coronavirus subvariants nicknamed FLiRT has given way to ever more contagious strains, a key reason behind the current high levels of COVID in California and nationwide ...
False-colour transmission electron micrograph of a B.1.1.7 variant coronavirus. The variant's increased transmissibility is believed to be due to changes in the structure of the spike proteins, shown here in green. There are many thousands of variants of SARS-CoV-2, which can be grouped into the much larger clades. [142]
A new COVID-19 subvariant, known as XBB.1.16 but often called "Arcturus," has progressively become more viral here in the United States, accounting for 10% of infections through late April.
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