Tweet from trvrb at January 28, 2022 at 08:48AM
Omicron viruses can be divided into two major groups, referred to as PANGO lineages BA.1 and BA.2 or @nextstrain clades 21K and 21L. The vast majority of globally sequenced Omicron have been 21K (~630k) compared a small minority of 21L (~18k), but 21L is gaining ground. 1/15
— Trevor Bedford (@trvrb)
Jan 28, 2022
from http://twitter.com/trvrb