What you need to know about XBB.1.5, the latest omicron variant
Four weeks ago, the XBB.1.5 variant caused less than 10% of COVID-19 cases in the U.S. Now it causes more than 25% of them. Virologists including Andy Pekosz, a professor of Molecular Microbiology and Immunology, are paying ...
Jan 10, 2023
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