Read more about the article Omicron now dominant in US as WHO urges greater effort to end pandemic
Democratic presidential candidate former Vice President Joe Biden speaks during the fourth day of the Democratic National Convention, Thursday, Aug. 20, 2020, at the Chase Center in Wilmington, Del. (AP Photo/Andrew Harnik)

Omicron now dominant in US as WHO urges greater effort to end pandemic

The fast-spreading Omicron variant is now the dominant strain of Covid-19 in the United States, health authorities reported Monday, as the WHO called for greater efforts to ensure the pandemic…

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