Epidemiologists warned travel curbs may be too late to stop Omicron from circulating globally.
The United States will restrict travel from South Africa and neighbouring countries effective Monday, a senior Biden administration official said. But it could take weeks for scientists to fully understand the variant's mutations and whether existing vaccines and treatments are effective against it. Omicron is the fifth variant of concern designated by the WHO.
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New COVID variant Omicron triggers global alarm, market sell-offThe discovery of a new coronavirus variant named Omicron triggered global alarm on Friday as countries rushed to suspend travel from southern Africa and stock markets on both sides of the Atlantic suffered their biggest falls in more than a year.
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