U.S. tightens COVID-19 travel rules as countries race to quell Omicron threat
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Reuters

SYDNEY/TOKYO (Reuters) – Air travellers to the United States will face tougher COVID-19 testing rules as several countries moved to seal-off their borders amid growing uncertainty around the virulence of the Omicron variant and its ability to dodge existing vaccines. In Asia-Pacific, Hong Kong and Japan said they would expand travel curbs, while Australia was bracing for more Omicron cases after at least two people visited several locations in its biggest city while likely infectious. In an attempt to stave off hasty global border restrictions, the World Health Organization called on countries…

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