Covid Live Updates: First U.S. Omicron Case Found in California

Officials said the C.D.C. plans to strengthen screening of international arrivals as countries try to contain the Omicron variant. A federal judge blocked President Biden’s vaccine mandate for health workers.Officials said the C.D.C. plans to strengthen screening of international arrivals as countries try to contain the Omicron variant. A federal judge blocked President Biden’s vaccine mandate for health workers.

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