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S.African data suggests Omicron gets around some, not all immunity
The Omicron variant appears able to get around some immunity but vaccines should still offer protection against severe disease, according to the latest data from South Africa where it is fast overtaking Delta to become the dominant variant.
Omicron accounted for 74% of the 249 virus genomes sequenced in South Africa in November, according to the National Institute for Communicable Diseases (NICD), which is collecting data as part of a wider national network for genomic surveillance.
不管是不是更毒,传染性应该是更强,淘汰了其他病毒
南非报告奥密克戎变异毒株1周后,该毒株已成为当地的主流毒株。南非国家传染病研究所表示,11月测序的所有病毒基因组中有74%是奥密克戎毒株。

S.Africa sees rise in COVID reinfections from Omicron, mild symptoms - scientist
South Africa is seeing an increase in COVID-19 reinfections due to the Omicron variant but symptoms for reinfected patients and those infected after vaccination appear to be mild, a scientist studying the outbreak of the new strain said.
More than 50% of African nations can now do the genomic sequencing to identify the variant, the WHO said, and those that cannot are partnered with nations that can.
"Previous infection used to protect against Delta but now with Omicron that doesn't seem to be the case," said Anne von Gottberg, microbiologist at South Africa's National Institute for Communicable Diseases.
She told an online news conference hosted by the World Health Organization (WHO) that she and her colleagues believed reinfections with Omicron and breakthrough infections in vaccinated patients would feature less severe symptoms.