New Covid variant XBB.1.5 is the most transmissible subvariant that has been detected yet, says WHO

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CNBC’s Meg Tirrell joins ‘The Exchange’ to repot on China’s covid cases, the omicron variant currently spreading and what it could mean for both China and global markets. For access to live and exclusive video from CNBC subscribe to CNBC PRO: » Subscribe to CNBC TV: » Subscribe to CNBC: Turn to CNBC TV for…