Here’s what we know so far about omicron XE;

•The XE variant has so far been detected in 637 patients, according to the latest statistics from the U.K. Health Security Agency.

•It is what's known as a "recombinant," meaning it contains a mix of the previously highly infectious omicron BA.1 strain, which emerged in late 2021, and the newer BA.2 variant, currently the U.K.'s dominant variant

https://www.cnbc.com/2022/04/06/uk-has-detected-a-new-covid-variant-heres-what-we-know-so-far-about-omicron-xe.html