The ‘Kraken’ subvariant: What you should know about the omicron descendant XBB.1.5

Editor’s note: This page will be updated as new data about XBB.1.5 emerges.

A new flavor of the omicron variety was identified in October 2022, and over the past few weeks it has steadily gained prominence in the United States. The subvariant is known as XBB.1.5, but has also been unofficially nicknamed “Kraken”, after the mythical sea monster.

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