The ‘Kraken’ COVID subvariant: What to know about the fast-growing omicron offspring

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

A new flavor of the omicron variant of SARS-CoV-2, the virus that causes COVID-19, was identified in October 2022. Over the past few weeks, it has steadily gained prominence in the United States. The sub-variant is known as XBB.1.5 but has also been given the unofficial nickname “Kraken”, after the mythical sea monster.

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