United States health authorities on Monday halved the recommended isolation time for people with asymptomatic COVID-19, as President Joe Biden warned Americans not to panic amid a surge of cases threatening wider social disruption.Speaking about the rapidly spreading Omicron coronavirus variant, Biden said some US hospitals could be “overrun”, but the country is generally well prepared to meet the latest surge.The coronavirus continued to punch holes in airlines’ busy Christmas holiday schedules Monday, with multiple airlines saying spikes in cases of the Omicron variant have caused staffing shortages.
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