The first confirmed case of the Omicron variant of Covid-19 in the US has been identified in California. In a White House news briefing, Anthony Fauci, the director of the national institute of allergies and infectious diseases and chief medical adviser to the US president, said the case was in an individual who travelled from South Africa on 22 November and tested positive for Covid on 29 November. 'We knew it was just a matter of time,' he said
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