Omicron subvariant BA.2 becomes dominant strain in U.S.: CDC

LOS ANGELES, March 29 (Xinhua) -- The BA.2 sub-lineage of the Omicron variant has become the dominant strain in the United States, according to new data released by the U.S. Centers for Disease Control and Prevention (CDC) on Tuesday.

The variant has been steadily rising in proportion due to its increased transmissibility compared to the original Omicron strain.