New Omicron subvariants BQ.1 and BQ.1.1 have accounted for about 70 per cent of new Covid-19 cases in the US as the country’s overall caseload has surpassed 100 million, according to the latest estimates by the Centers for Disease Control and Prevention (CDC). BQ.1.1 was estimated to make up about 38.4 per cent of circulating […]

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