Covid Live Updates: U.S. to Tighten Testing for Travelers Amid Omicron Worries

The U.S. will require air travelers to provide a negative test within 24 hours of their departure. A judge blocked a vaccine mandate for U.S. health workers.The U.S. will require air travelers to provide a negative test within 24 hours of their departure. A judge blocked a vaccine mandate for U.S. health workers.

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