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65438+ February 15 15:00

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Extended news: 2021165438+1On October 26th, the World Health Organization defined it as the fifth "concern mutant" and named it the Greek letter Omicron mutant. 165438+1October 29th, WHO said that the overall risk assessment of COVID-19 Omicron mutant in the world is "very high", and it may spread widely around the world. On February 9, 65438, the reference news reported on the website of the Guardian that scientists had discovered an "invisible version" of Omicron strain which was more difficult to track. On June 4th, 2022, WHO indicated that 128 countries and regions had reported the discovery of Omicron mutant before Christmas and New Year holidays.