a schematic diagram shows the origin and evolution of a subvariant kraken xbb.1.5.

schematic diagram shows origin evolution subvariant xbb relative variant turn recombinant omicron sublineages kraken 2019-ncov alpha 529 ba2 banner beta concept concern corona coronavirus covid-19 design family genealogical genetic graphic gryphon health icon label lineage mutant mutated mutation name omikron recombination scientific sign stealth strain subtype symbol text tree vector virus xbb 1 5 ba 2 75 ba 2 10 1 sublineages