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WHO announces that "Of 899,935 Covid-19 test samples sequenced and uploaded to the global Covid database in the last 60 days, 897,886 (99.8%) were confirmed to be Delta, while 713 (0.1%) were Omicron." Cases in South Africa rise by 110% in one week. [90] Cuba reports its first case, in a person who had traveled from Mozambique. [91]
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 ...
Tests that detect multiple gene targets were to continue to identify the testee as positive for COVID-19. S-gene dropout or target failure was proposed as a shorthand way of differentiating Omicron from Delta. besides sequencing and genotyping.
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]
South Dakota: Health officials announce the state's first five confirmed cases and one death. The lone death tested positive for COVID-19, but the cause of death is still being investigated. [170] The President and VP Pence met with top health insurance companies and secured a commitment to waive co-pays for coronavirus testing and treatment.
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A common stomach bug is surging, according to new data from the US Centers for Disease Control and Prevention.. In the week of December 5, there were 91 outbreaks of norovirus reported, up from 69 ...
Here are some of the common mutations present in the spike protein of lineage B.1.617. Not all sublineages of B.1.617 share the same mutations: L452R. The substitution at position 452, a leucine-to-arginine substitution, confer stronger affinity of the spike protein for the ACE2 receptor and decreased recognition capability of the immune system.