BA.2

Etymology
From being a mutant version of the variant and the older designation. Pango notation does not officially support 4 sublevels, leading to a need to renumber "B.1.1.529.2", thus shortened to a new base "BA" for "B.1.1.529" and ".2" becoming "BA.2"

Proper noun

 * 1)    A subvariant of the . A highly transmissible variant of the , which causes ; which became dominant at the turn of the year 2021/2022 in.