Omicron sub-variant BA.2 makes up about 35% of COVID variants in US - CDC
BA.2 is becoming more common in the US, as its circulation is up from 22.3% of all variants during the week that ended on March 12.
Test tubes labelled "COVID-19 Omicron variant test positive" are seen in this illustration picture taken January 15, 2022. (photo credit: REUTERS/DADO RUVIC/ILLUSTRATION)ByREUTERSUpdated:
