A virologist on COVID variant XBB 1.5
The Decibel
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What Happened to XBB 1.5?
XBB 1.5 is actually a combination of two different BA2 derivatives that then went on to infect other people and acquired still more mutations. It increasingly, unfortunately, it's not very uncommon because there is so much Omochron around. There have been multiple waves since Omochron first emerged over a year ago.
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