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Explainer-What do we know about the XBB.1.5 Omicron subvariant?

The Omicron subvariant, XBB.1.5, is causing concern among scientists after its rapid spread in the United States in December. The World Health Organization's senior epidemiologist Maria Van Kerkhove said XBB.

Thursday, January 5, 2023 at 11:29 am

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